Represent/get your belongings, feelings, style, or general attitude.
It , gechya muthafahkkin money. Or beat some ass
Mike: That bitch owes me $20
Ernie: ay man, rep yo shit
Mike: Man, that bitch got the same shoes as me
Ernie: uh oh, rep yo shit
Copernicus: Ah i hate that muthafucka, he brang the hateraid.
Ernie: well sumtimes u gotta choke a bitch, go rep yo shit.