A woman who fucks tons of guys

When two or more people regularly fuck behind a dumpster

When he busts a load straight into your pussy and his cum just collectively adds up-eventually becoming enough to fill a dumpster

A person who takes on a lot of cum

my ex girlfriend was a cum dumpster

A total douche bag; a barnacle on the ass of society; will have sex with anything that moves, insuring that he will indeed reproduce and supply the world with miniature cum dumpsters that will live the same glorious life as their father, starting the cycle anew.

Someone (most likely of low class) who enjoys filling themselves up with cum.