Boston slang consists of words and phrases of slang originating from Boston. Though most often used in Boston, the slang can also be heard in other cities of Massachusetts or even other New England states, though not always as frequently. Some terms are less commonly heard outside of the Boston area than others; some are not used at all outside of Boston.

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Slang terms
A

ABI - American Born Irish; someone of Irish descent born in the United States who enthusiastically admires Ireland and Irish culture.
B

bagged - arrested; "He got bagged for a DUI."; (Driving Under the Influence)
...as/like balls - used to exaggerate a statement, often about the weather; can be used both positively and negatively ("The Red Sox played like balls today" or It's warm as balls in here")
bang - to make a left turn (often, "bang a left"; also used often as "bang a U-ie" - make a U turn); sometimes used interchangeably with hang
barney - a Harvard student or graduate (used by working class residents of Somerville). Rarely used today, now yuppie is used as a desciption of almost all outsiders, including college students and extreme left wing liberals.
barrel - trash can
The Basement - Filene's Basement, a department store in Downtown Crossing
bazo - a drunkard; used mostly in South Boston (rare)
Beacon Hill - the Massachusetts government, particularly the State legislature
Beantown - Boston (seldom used by Bostonians)
The 'Berry (or the 'Burry) - Roxbury
Big Dig - the Central Artery Tunnel Project
BoSox - See Sox
Brahmin - Boston Brahmin
Breakdown Lane - right margin or shoulder on highways used for broken down vehicles. Cars can drive in the breakdown lane at certain hours on some Massachusetts highways.
Da Broons - Reference to the Boston Bruins, also often called The B's.
bubblah [bubbler] - water fountain
bulkhead - outdoor entrance to the basement
C

Calm your liver - chill out (uncommon)
The Cape - Cape Cod
cellar - basement (alternatively, down cellar)
The Chal-es - The Charles River
Children's - Children's Hospital Boston
chowdah [chowder] - New England clam chowder, or occasionally fish chowder. Never, never, the Manhattan variety of clam chowder.
chowderhead (sometimes chowdahead) - stupid person
cleanser - dry cleaner; used more often in the names of dry cleaning shops than in actual speech
Comm Ave - Commonwealth Avenue
The Combat Zone - the red light district of Boston that used to exist between Downtown Crossing and Chinatown
The Common - Boston Common
Cow Hampshire - derogatory term for New Hampshire
Cruiser (Crew-zah) - a police car
Curse of the Bambino - see article
D

decked - adj., dressed nicely ("decked out"); past tense verb, punched
Dot - Dorchester, MA.
Dot Ave - Dorchester Avenue
Down East - A section of the Maine coast that is actually north of Boston
D-tech -An undercover police car
E

Eastie - East Boston.
elastic - rubber band
F
Fuckin A; allright, sign of approval
Fuckin A Shit Skippy; see above
FBI - Foreign Born Irish; someone born in Ireland; an Irish immigrant
the flat of the Hill - the portion of Beacon Hill between Charles Street and Storrow Drive
frappe - a milkshake; the term milkshake has a separate use (see below)
G

Gahden - a reference to the Boston Garden or the TD Banknorth Garden, home of the Boston Celtics and the Boston Bruins
Grinder - a submarine sandwich, more often called a sub.
H

hang - to make a right turn (often, "hang a right"); sometimes used interchangeably with bang
hibo [pron. "high-bo"] - the Ancient Order of Hibernians; a member of the AOH; its meeting hall
the Hill - Beacon Hill
Hoodsie (1) - A small cup of vanilla and chocolate ice-cream from the HP Hood Company.
hoodsie (2) - In neighborhoods such as South Boston and Dorchester it refers to a precocious minor female who tries to appear older or wants to date older teenage boys or young men. The term is considered derogatory: "He'll get bagged if he keeps dating that hoodsie." Popular knowledge tells that the expression comes from the idea that the small cup a Hoodsie ice cream treat comes in is the same size as the bra cup of a hoodsie.
hook - used interchaneably with hang; ("hook a right")
hosey - to claim ownership of something; ("I hosey the front seat.")
The Hub - Boston; shortened from Oliver Wendell Holmes, Sr.'s phrase The Hub of the Solar System (often misremembered as Universe) (seldom used in conversation, but seen often in writing and advertisements, e.g. in the Boston Globe)
I

the Irish Riviera - the South Shore suburbs on the coast such as Quincy and Weymouth to the southeast of Boston
J

jimmies - chocolate sprinkles for ice cream.
JP - Jamaica Plain
L

lace curtain Irish - a person of Irish descent who is moving up the social ladder; ("After they moved to the Point, they became lace curtain Irish.")
the law school - Harvard Law School
the Leather District - the neighborhood surrounding South Street in Boston
"Let's go, Southie, let's go!" Rallying cry for South Boston High School, used by anti-integration activists during the Boston busing crisis
"Light dawns on Marblehead" - used when a dense person finally realizes something. Also any variation such as, Dawn breaks on Marblehead.
the Lower End - that part of South Boston around the Broadway MBTA station
M

Maine-iac - deragotory term for Maine driver or resident, on par with Masshole
Man's Greatest Hospital - Massachusetts General Hospital (alternatively, the medical-industrial complex)
Mass Ave - Massachusetts Avenue
Massholes - derogatory term for residents of Massachusetts, especially of Boston drivers (popular in New Hampshire).
Me'fah or Med'fah - Medford, Massachusetts; an exageratted pronunciation of the way the city's name is supposed to sound when it's pronounced by its residents; even if no one in Medford pronounces it that way, people living in Greater Boston will refer to the city by that name.
milkshake - milk mixed with flavored syrup; differs from frappe by not including ice cream
The Mother Church - First Church of Christ, Scientist in Boston
N

"No suh!" [No sir, compare "no sirree"] - "No way!"
P

packie (also package store) - liquor store
Pats - the New England Patriots
the People's Republic - Cambridge (alternatively, seven square miles surrounded by reality)
The Pike - the Massachusetts Turnpike, also the Mass Pike
pissa (1) - cool, good: "You hit the Lottery? That's pissa man."; less commonly it can be used instead of pissed to mean drunk: "I had ten beers last night. I was wicked pissa!"
pissa! (2) - used as an exclamation when something goes wrong: "Oh pissa!", he shouted as his car keys fell down the storm drain.
the Point - the City Point area of South Boston
pol(s) - politician(s), political operative,
P-town - Provincetown, Massachusetts
R

Red Sox Nation - the body of fans of the Red Sox
re-re- an idiot ("He's a wicked re-re."). A derogatory variation on "retarded".
The River - the Charles River
Ros, Rozzie - Roslindale, MA
Rox - Roxbury, MA
S

Salt and Pepper Bridge - Longfellow Bridge
Seltics - Reference to the Boston Celtics.
Sketchy - A term used, most often by teenagers, referring to something strange or off-color.
skally - a driving cap or an ivy cap that has snap button front
Slumerville - A derogatory term for Somerville, MA, referring to it's working-class population. Now rarely used due to gentrification.
Smells 'n' Bells - The Church of the Advent, an Anglo-Catholic parish on Beacon Hill noted for its high church liturgy
smoot - a unit of measurement used to mark the length of the Harvard Bridge
SoBro - South Brookline
soda - soft drink
So don't I - pleonasm [1] used to agree with a statement; a replacement for "me too"; ("I like the Red Sox." "So don't I.")
Southie - South Boston; also used for residents of the area
spa - neighborhood shop that sells groceries, soda fountain drinks, sandwiches (or other prepared food) and miscellaneous notions. Spas of this sort include the Hillside Spa Cardoza Brothers, on Hancock Street, or the Brookline Spa, in Brookline, MA.
spuckie - submarine sandwich, or the bread it was made with. Rarely used anymore. Replaced by "sub".
SoWa - the southern portion of Washington Street in Boston. A term created by the real estate industry and not used in common speech.
Sox (also The Sox) - the Boston Red Sox; pronounced "socks" or "So-AX".
The Square - Harvard Square
Statie - Massachusetts state trooper, or police officer
superette - grocery store that is considerably smaller than a supermarket (seen on signage, but rarely used in conversation)
T

Tard - derogatory for retarded..."slow"
The T - the Massachusetts Bay Transportation Authority; also used for services run by the MBTA, particularly the Subway
Taxachusetts - derogatory political state title and comparative reference to the limited taxation of neighboring New Hampshire
time - A retirement or going away party. "Did you here Sully's retiring?" "Yeah they're having a time for him down Florian Hall"
tonic - soft drink (like "spuckie", an older term that has gradually been replaced)
Tory Row - historic neighborhood of Cambridge, home to prominent British sympathizers before the American Revolution
townie - In the strictest sense, a resident of Charlestown, Massachusetts; or more broadly someone from Somerville or South Boston or the other Irish-Catholic enclaves of Boston and surrounding areas. Also used as an adjective for the accent of those areas; or to describe a person who shares many characteristics with the residents of those areas. Occasionally, a person who was born/lived their life/died in the same town, village or 'burb. A resident of a college town who is not affiliated with the college (more used by non-local college students than by Boston area residents).
triple decker - a three-story, three-family house
Triple Eagle - Someone who has graduated from Boston College High School, Boston College, and Boston College Law School. Taken from the fact that all three schools use the eagle as a mascot.
U

Upper Mass Ave - the stretch of Massachusetts Avenue that runs north from Harvard Square toward the town of Arlington
V

The Ville - Slang term used for the city of Somerville.
Villen - a resident of Somerville
The Vineyard - Martha's Vineyard
W

Westie - West Roxbury
whip - to throw; "I whipped the ball at his head."
whoopie pie - a pastry first sold commercially at the Berwick Cake Factory in Dudley Square, Roxbury
wicked - very; or occasionally cool. Used indiscriminately, can modify anything (e.g.: "Wicked good." "Wicked bad." "Wicked boring.", etc.).
wicked pissa - awesome, very cool

Yer Ass is grass- you are in trouble-due for an ass whuppin

Neatohuh? lol TCBS BigChris