Meaning ; a ghetto way to say "yes I said that "or, "that's what went down" or the main part of an intresting thing that happened . Saying "that part " puts emphasis on something someone has just said basically trying to make it a big deal or letting it be known in a bragging sort of manner.
Ex: (girl talking to her ghetto friends)Yep me and that shayla's man hooked up at the party in the bathroom last week , that part! (They all laugh)
by mulattto October 03, 2013