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 10, 2004
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Sorry about the smell, I've just kacked my pants
by Turkey January 12, 2005
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To Kack: To hit inanimte objects (intentionally) with a moving vehicle. Typically done to amuse oneself.

Not recommended to be done in new cars (due to dentable plastic bumpers).
Dawn and Alana went kacking durning their lunch break and knocked over 15 trashcans. A kacking record!
by Dawn, Alana, & Charlotte June 22, 2006
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Combination of Fucking and Crap.
Another word for excrement.
Kackhead!

I nealy kacked myself back there.
by Jay September 23, 2003
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to have gotten laid.
That girl is walking funny, she must have got kacked hard!
by Jason Berti December 1, 2007
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