A female who has a nice or unusually large ass.
Damn son yo shawty over dere got sum junk in da trunk!
Big booty usually a big one that is very "velupcuious"(not spelled right).ba dunka dunk
That way you shake that "junk in da trunk" it turns me out.
referring to the amount of "material" in one's ass
Yo, da hoe gots a lotta junk in da trunk
YO CHECK OUT HER JUNK-IN-DA-TRUNK SHE GOT A NICE SET O' BUNS BRAH
that ass is packed with a multitude of flesh. a gaping butthole
man she got some junk in da trunk