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1.
Dutch for cheese, only kaas is much worse than cheese, cheese is the evil partner of kaas.

Also used to say that things are shitty.
#1 ZOMG! Your pc is kaas!
#2 You smell like kaas
#3 Kaas is the seccond nectar of the godz
by ELX[Draco] February 23, 2005
 
2.
Person 1: hey what do you wanna do today

Person 2: howa bout i Kaa! on your tits
by DeFrost December 09, 2009