look up any word, like the eiffel tower:
 
14.
The pinnacle of all that is awesome.

Not to be mistaken for the German verb "kacken," which means "to defecate."
Megan: "Man, Jack Black is amazingly kack!"

Sam: "Dude, I gotta take a massive kack."
Sally: "No, dumbass, that's not how you use the word!"

by blackbayou August 23, 2007
 
1.
to fuck; to have sex
I walked up to this girl and I said "Let's Kack!" and she was like "Aiight take me home baby"
by UrbanLyfe May 03, 2009
 
2.
Underpants, shorts.
Bob was minging, he had not changed his kacks in weeks.
by TrevorM December 05, 2008
 
3.
kack means :-
1) from latin which refers to wiping your arse

2) means shit , ballshit , arse wipe

3) crap

4)tosser/ wanker
1) s/he talks kack
2) s/he's a bit of kack
by hycksos June 07, 2009
 
4.
1.Moose dick, used in some ones mouth. usually some one who is not aware of how much moose kack they suck.
2.To fuck up in a major way.
1.You suck big moose kack.
2.You totally Kacked that shot.
by ja ca December 23, 2007
 
5.
Australian Slang. To describe how someone laughed at something.
"He absolutely Kacked himself when Darc fell down those stairs".
"What a Kack!"
by Eamon Hale August 09, 2004
 
6.
To Kak.

To pull down the trousers (and possibly undergarments) of another person, much to the amusement of the people viewing, and to the embarrassment of the person being kacked.

See Keg.
Tom was playing pool, when his tracksuit bottoms were kacked from his person.
by Batty Boi23 March 02, 2009
 
7.
Female genitalia. Often used in women's college dormatories and in rap songs (hopefully).
Oh god man, you need to smack that kack!
by Erica Camp November 30, 2005