A homie who lets his bros blow a load in his ass after a breakup or when they're feeling a little extra horny. A cumster dumpster can be gay but is most often just a really sweet straight guy
by big tiddy goth boyfriend November 12, 2020
"Dude she is a total cumster dumpster. She slept with 5 dudes last night and none of them wore rubbers."
by greenthirstyturtle March 21, 2013