cusit Share definition Flag an expretion in hebrow, that means "a verry nice looking girl". the word "cusit" comes from the word in slang "cus" that means "vegina" way! eyze cusit! (wooow! what a nice looking girl!) cusit by Ginzzz September 7, 2005 0 0 Get merch Get the cusit mug. Buy Now — $32.95 See more merch