Bill Cosby Share definition Flag When you slip something in a girl's drink so you can take advantage of them. I am such a weak guy, I am going to have to Bill Cosby that girl if I want to get layed. Bill Cosby by crazyhairstyler71@gmail.com December 14, 2019 0 0 Get merch Get the Bill Cosby mug. Buy Now — $32.95 See more merch