A human who exists for the purpose of providing male mammels with a life into which it can watch its semen pour. Key elements of a cum dumpster are that it must feel degraded and disgusted with itself even though it orgasms while its user spurts hot seed into it. All females and many males are cum dumpsters.
I wish I could stop openning my mouth and allowing my wife to watch me serve as a cum dumpster, taking the hot stream of sperm which poured out of her cunt after she had been used as a cum dumpster by her brother and his friends. I was a cum dumpster's cum dumpster, and I hated myself for enjoying the used loads I ate.
by load holder March 22, 2012

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Any person who needs many different men to put semen in her snatch or her mouth. She generally tried to accomplish this by stealing other peoples men by pretending to be their friend.
That Christy girl stole my husband and is now his cum dumpster.
by IhateGrigsby October 24, 2011

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A word pertaining to a person (namely female) who spends most of his/her time welcoming load afer load of semen into his/her multitude of perforations.
Guy 1: Dude, that girl Karah is such a cum dumpster.

Guy 2: I know bro! She took seven loads before finally leaving my house last night!
by PewPewLazrBeams November 03, 2010

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Big whore. Still can't count the amount of partners she's had in the last 10 years on both hands and feet put together. You can tell who they are. There usually the one's asking you to by them a drink at the local dive on a Friday night. The woman that offers to by you a drink probably has had it with her cum dumpster friends getting her in brawls over Hoe action.
Girl 1: I can believe you left him. He's so buff. What happened?
Girl 2: After I found out he'd been with that cum dumpster I couldn't stand the sight of him any more. She's been pounded by more men than Debbie Dallas.

Girl 1: Wow your pissed
Girl 2: He'll get his when he's broke and she leaves him for the next fool with a little bank to support her.
by SpeaktheTruthWanker January 13, 2010

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1. A female who lets all men have easy access to the cat from down under.

2. See Paris Hilton
Mike: Hey what are you doing tonight?
Joe: I don't know, probably gonna watch porn.
Mike: Dude, you don't need to do that. Hey come over to my place, I got us a cum dumpster for the night.
Joe: Sweet.
by Killthepond December 10, 2005

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Well a cumdumpster is that really annoying person in your life they always follow you around a make you wanna kill yourself but its all good. This person could also be defined as an asshole on steroids. No biggy tho its only steroids its not like its weed, like god are you sick or something. Weed is gross. Cumdumpster could also be defined as a slut who always has cum in the vagina.
mom your such a bitch dont even talk to me like your such a cumdumpster all you do is get cum in your pussy like eww bitchhh
via giphy
by pussy lyn January 23, 2017

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Any slackjawed gapemouthed semen hungry fuck socket that sucks on the snotty end of a piss-pole more often than is considered proper for polite society.
Aphen'tra is such a cumdumpster that i fully expect to find her faced down in an alley with nut stains on her back and joy juice dripping from every orifice.
by Anjomo December 01, 2016

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