Top Definition
One who has sex with someone else to better their situation.
Dude, did you hear about all the money she has coming her way? The only possible explanation is that she's an upfucker.
by One dude. May 21, 2009
Someone who is fucking anally while the one being fucked is standing.
"You wanna upfuck tonight?"
"Yeah, sure"

"You are such an upfucker!"
"I don't do it like that."
by fuckkk October 21, 2013
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