by Baby Boom Estévez November 1, 2018

Any place where a lot of cum ends up. A funny and alternative way to call someone a whore. A part of a body that touches cum of often.
Definition 1
Boy 1: My room is so dirty cuz all the fappin i have been doin lately. My pillow and webkinz are like a cum dumpster now.
Boy 2: Thats fucked up.
Definition 2
Boy 1: Dude, that girl slept with 5 guys last night.
Boy 2: Woah! She is a cum dumpster!
Definition 3
Boy 1: She sucks dick every night bro.
Boy 2: She got a cum dumpster for a mouth.
Boy 1: My room is so dirty cuz all the fappin i have been doin lately. My pillow and webkinz are like a cum dumpster now.
Boy 2: Thats fucked up.
Definition 2
Boy 1: Dude, that girl slept with 5 guys last night.
Boy 2: Woah! She is a cum dumpster!
Definition 3
Boy 1: She sucks dick every night bro.
Boy 2: She got a cum dumpster for a mouth.
by DumpinCum January 28, 2014

by Frankiethesecond July 6, 2014

Nikki's girl was such the cum-dumpster, and yet the clueless, naive idiot revered her like a queen while most reamed her like the easy, sleazy ho she was.
by Nikki Stixx September 10, 2020

A promiscuous woman who is not choosy about her sexual partners and who allows most or all men who she has sex with to cum inside of her without protection.
by arkark November 6, 2011

A receptacle for you and the rest of your town to put your ejected semen in. said recepticle is usually a slutty ho.
by whomper May 1, 2003

That girl you use to put your spare cum that is too good for tissue paper but not quite good enough for a side chick.
Guy 1: Is that your side chick?
Guy 2: Nah that's just the cum dumpster.
Guy 1: Is she any good?
Guy 2: Eh it's better than PornHub.
Guy 2: Nah that's just the cum dumpster.
Guy 1: Is she any good?
Guy 2: Eh it's better than PornHub.
by The Dankster Gangster March 23, 2017
