Top definition
To uncontrollably shit all over your partner/girlfriend/wife without any prior warning. Usually occurs after severe alcohol consumption. Similar to a Boardman.
James didn't realise he was about to kissack all over her room...

"Dude, I just kissacked everywhere!"

"You're suck a drunken asshole! You've kissacked all over me and my room!!!"

"That was a good kissack"
by fishontoast April 17, 2009
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