Jack Squat

Something you don't know.

I don't know jack squats about music

by Mr13BF July 9, 2012

Jack taco

empty, containing or meaning nothing

Dude, we ate all of the pizza, there's jack taco left.

by Sarah March 10, 2004

jack-knife

another term for a rude person, synonymous with asshole, jerk, dick, bastard

a way to curse without offending your grandparents

1) Dude, look at that jack-knife over there, what a douche!!
2) Quit being a jack-knife!!

by Jigga JMO September 16, 2008

Jack Hammer

cocaine; the white candy; snappers

I had Sally doing jack hammers off my d**K

by daB May 18, 2004

jack frost

When you are outside on a cold winters morn' and it's so freezing that you cant feel your hands, you start jerking it with your numb hand and pretend its someone else doing the work.

Mo: "Dude i'm freezing my nads off out here; this sucks."
Fatty (smiling): "That's why i'm givin myself the gnarliest jack frost!!!!"

by SJE 42 January 26, 2008

flap jack

a pan-cake of sorts. excelent for scolding people's faces off. when not completely cooked, acts as a delicious form of napalm.

after he threw me threw the window, i grabbed a flap jack and he knew i meant business.

by bilbo January 4, 2004

jack

To be seriously messed up. Whiggers often use this phrase when trying to act ghetto.

That teacher gave me a D because I didn't cite them correctly." "Foo, dats jack." "...Stop. Just stop. You're not black

by >;{D June 19, 2010