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When you're fucking a chick doggy style, she's hanging her head over the toilet either, dry heaving or upchucking (vomiting).
Woman is drunk, you're drunk, you gotta get your nut. So, you enter her from behind even though she is starting to throw up, or upchucking, maybe she's got the dry heaves and nothing comes out of her mouth. You don't care as long as you get to upchuck fuck.
by Redballs May 30, 2008
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2
1. a fetish with vomit (and sexual interaction) 2. fucking someone so hard they throw up 3. a girl's gag reaction causing her to vomit while giving oral sex.
Tami was giving me head and then all of a sudden she pulled an upchuckfuck

I heard Tom likes a good upchuckfuck...ewww

I was giving it to her so hard, it turned into an upchuckfuck!
by alexagk April 26, 2006
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3
The act of throwing up while fucking a fat women.
Fat-women: If you do ill give you big bucks.
Guy: I guess, if i get good money.

Guy: Sick. BARF!!!

Fat-women: why do guys always up-chuck fuck me!
by asdf10 June 08, 2009
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