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9.
Verb: to break or fail.
"The photocopier sounds like it's about to kack."
"My computer kacked-out last weekend."
by Jaw-Knee Bear-Toe October 24, 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.
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
 
3.
Underpants, shorts.
Bob was minging, he had not changed his kacks in weeks.
by TrevorM December 05, 2008
 
4.
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
 
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