Thats what is normally said from a person when another person say something thats disagreed with. This word also gives hypeness to someone that is already angry about something. It originated on the Northside of pittsburgh.
Skype: Nigga that bitch Iesha got cake Rock: Nigga thats what, her ass is small as hell.
Fuck you nigga, thats what....you can't see me nigga, thats what, thats what bitch!