A slang combination of the words spoken in the phrase, "That is what I am talking about." originating in North American urban sub-culture developing in the twentieth century.
*Two urban youths recognize each other while walking outside one day*
Urban youth A: Hey, wassup' mang?
Urban youth B: Just goin' to this party, you wanna' go?
Urban youth A: yeah dasswamtalkinbowt'!