in replacement for the word "fuck". When you are in a situation where the word fuck would be innapropriate, the word CUSK is used. Dont use this word if youre trying to be a hard ass or if your talkin shit...cause you'll sound like a dumbass. ... can also be used with the word "coosy" which is slang for pussy.
"Man cusk you" ... "Cusk this stupid ass homework" ..."Cusk you Coosy"