Wack 

Wack, in actual fact, means really really good.
it was originally used to replace the word weak (uncool) but ironically came to mean the exact opposite (un-uncool... ie cool).

Toby: that Alioop was wack man!
Jimeny: sure thang dawg...it was pretty f***ing cool!

Wack by The Hot Rod January 21, 2008

wack 

a lame gangsta slang word for cool.

"Dayum, that CD sounds wack!"

wack by Daddiyo June 30, 2008

wack 

used to describe:

1)any person who, regardless of reasoning, just can't pull the right moves to be with the 'in' crowd

2) any failed attempt at a cool stunt or complex pick-up line

3) an overly dressed or tacky person

1) After witnessing the new kids outdated dance moves, the clicke of 'cool' kids declared him wack and moved on to the next wannabe.

2) As the kid dusted himself off after failing at a double beer chug, one of the girls muttered to her friend" wow, that boy is wack!"

3)As the jeri-curled, headband wearing, oversized pendant bearing thirty year old made his way towards the party from his rusty el camino sittin on 20's, about fifteen people asked their friends 'who's this wack mo-fo?'

wack by The_Enigma_of_all_enigmas_1109 February 23, 2010

wack 

Not funny at all, also can be used in the same text as jake or lame

Niggaz who think they are hard are wack

wack by Malcolm aka Q April 9, 2003

wack 

just plain stupid, a crazy (not mentally) person

tracey: im going to walk up this skyscraper

rob: you so wack...

wack by ben nwankwo April 16, 2005

wack 

Crazy, unbelievable, nuts, "off the hook"

Dude, this house party is gonna be wack!

Comment submitted with request to Delete: "Wack is never used as a positive term, to use it in this manner would be completely inaccurate and lowers the overall quality of this excellent website."

wack by Anonymous April 15, 2003

wack 

a very cool term. Used to describe someone when they say or perform an action that is admired by others.

dude, amanda is so wack

wack by awahlstedt October 8, 2011