Top Definition
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"
von UrbanLyfe 3. Mai 2009

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Underpants, shorts.
Bob was minging, he had not changed his kacks in weeks.
von TrevorM 5. Dezember 2008

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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
von hycksos 7. Juni 2009

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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.
von ja ca 23. Dezember 2007

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A word you say out loud to annoy people in a shopping mall, strip mall or YMCA location.
Kack!! You annoyed? Well KACK!!!
von KinkoX120 24. September 2015

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Australian Slang. To describe how someone laughed at something.
"He absolutely Kacked himself when Darc fell down those stairs".
"What a Kack!"
von Eamon Hale 9. August 2004

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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.
von Batty Boi23 2. März 2009

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