1) Lame, sorry ass, aint even legit 2) To Jerk off
Example 1: Tracy: I'm all that and a bag of chips!..and then some! Rob: Shut yo wack ass up!.. and gets off my Grill. Example 2: Tracy: What did u do last night? Rob: I was wacking my dick ...RAW... thinking about you.
By Shady Ass Rob
When you commentating a ping-pong ball match
Guy 1: hits ping pong ball Guy 2: hits ping pong ball You, the commentator: wack wack wack wack wack wack
By foop629
something that sucks horribly; stupid; fake; talentless
that new jay-z joint is wack as fuck.
By zach
Wack - crap, shitty, no good. A word used verbally by those who see themselves and their peers as gangster. For someone to define something as wack, theyre saying its shit.
Person 1: Yo, you want a drag of this? Person 2: Nah that shit is wack.
By Giorgio Enziano
Hip hop artists (MCs, DJs, B-boys, etc) who are typically aspiring and full of themselves, yet their style is an insult to real hip hop because it (1) copies another artist's style, (2) is mainly driven by commercial aspirations, or (3) is basically incompetent with no hope of improving. Wack = weakly executed flashy moves in place of true substance.
Even the wackest rapper can be a commercial success with a major label behind him.
By psychicoctopus