phrase made popular by rapper Noreaga or NORE. it can be used as a greeting like what up. or in a fight when you win, then get up in that bitches face and be like, what what!
i said what what in the butt, i said what what in the butt, you wanna do it in my butt, in my butt, you wanna do it in my butt, in my butt, you wanna do it in my butt, in my butt, lets do it in the butt, OK.