1. adj; something in bad taste or is otherwise unappealing.

2. verb; to murder someone.

3. verb; to masturbate.
1. Yo Freddy, turn off the country music. That shit is whack.

2. Freddy, turn off that fuckin' country music before I go and whack ya.

3. Freddy, I said turn off the country music, I didn't say pull your johnson out and start whackin' it. The fuck?
by Eapert McDangles June 29, 2006
1. adjective; appalling in nature, unconventional.

2. verb; to strike one with the hand or fist.

3. verb; to assassinate.
1. yo, that's whack.

2. if your mother heard that she'd whack you upside the head.

3. you want we should whack a dog?
by bud newman. February 28, 2003
a word they used around the 1950's and 1960's refering to knocking somebody the fuck out or killing 'em without using arms. Often used in the triology 'The Godfather'.

1) Clemenza: Hey the Godfather asked for a direct favour, you up for a challenge?
Soldier: I'm loyal to the family, how can I help?
Clemenza: The Corleone's want that Turk asshole working with Tattaglia whacked as soon as possible. They set up Luca Brasi and we want him dead.
by # 1 Stunna July 27, 2006
an event, action, or thing which makes no sense or is contrary to a logical course of action; something entirely disagreable or undesirable; A non-sequitor;
That's whack!
by Mirak Meffit August 21, 2003
Tony, did you whack that guy yet?
by idk October 5, 2003
As used by The Token Black Guy in films, in order to illustrate that he is, indeed, The Token Black Guy
by jonny hopper November 6, 2003