@Tanya-Shivari what???

A "Cum Dumpster" is the raunchiest type of sex worker. In the back of seedy strip clubs there are these stalls with a chair in each one behind a curtain.. Women (dancers) that spend all day, every day; in those gross stalls getting a train of random men run on em. Cumming inside them.

Open to the public. Just like a dumpster. Anyone can go there to dump their cum inside them at any time. Cum dumpster. 

This is the only definition that's actually correct. A trash dumpster is open to public, in a stationary place, it's filthy. Make sense?