Whack

1.) to masturbate (alone)
2.) crazy
3.) to hit something
4.) to masturbate (with another)
5.) to knock-up

1.) I was totally whacking last night when you called. Thats the sound you heard, and that's why I was breathing heavy.
2.) That shit is so fucking whack!
3.) I whacked the cookie out of her hand before she could eat it...
4.) My friend and I were in a tent last night. I got horny, then he looked at my boner and got horny too. So, I whacked his dick and he whacked mine. Then we made out...
5.) I whacked this fucking hot chick last night. She was great. Hope she don't get pregnant.

by Big Boi12304 April 13, 2008

whack

A term used for PCP.

He got all crazy smokin' that whack!

by Jack Batemaster January 8, 2006

whack

crazy, or cool

"man, jay knows some mad-whack positions"

by violent jay July 14, 2002

whack

A white - black person, A wigger (a white person trying to be black)

Any White guy that considers himself a "Homie" or black

by Krista May 13, 2005

Whack

A combination of the words wh(ite) and (bl)ack". Negatively used to describe a caucasian male with an attempted attitude which resembles those of ebonic men.
See wigger and Eminem.

Hey, look at that whack white guy with his puffy jacket and baggy pants.

by Ancient Knight November 11, 2003

whack

to procrastinate and do nothing. When one engages in whacking, often girls, they may go to the bars on a monday night, movie, shopping, or just sit around and do absolutely nothing. This is a whole new meaning for the word...thanks to the KD Ladies @ SLU.

Aly: "Does anyone want to whack with me after class?"
Meg: " Sure I will. What are you giong to do?"
Aly: "Oh probably go shopping and tanning then maybe workout, I don't want to do my homework tonight."

by Ali April 22, 2005

Whack

Totally out of control beyond belief

Jaci John is whack as shit!
@jaci_janemarie on twitter.

by DrosFro May 13, 2011