The act of making love to someone in an unsatisfactory way.
She complains I was just another underfuck.
by Frank1957 October 17, 2007
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1. Yo look how hard she's hitting on him... she's definitely underfucked!

2. That guy is completely underfucked. He just desperately asked her out again after she told him to fuck off for the third time...
by Stephen and friends June 23, 2010
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the person who criticizes a lot
(at a lesson a person criticizes all the time)
me: He's such an underfucker!
by beduina November 06, 2013
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The person who does not have enough sex and is acting frustrated all the time
John: Why Becky is so annoying? what is wrong with her?

Mary: Oh, she is just underfucked.
by equillibra August 04, 2017
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What my wife does to me in bed when she's really really worked up and liking it - trying to have an orgasm - she usually does it when a good man takes his time and.... well you know what comes next. But yeah underfucking is amazing if you haven't already tried it I'd highly suggest you train her up to grind from the bottom upwards. Peace.

J. Turner 10-14-21018 Nevada.
Damn.... I was underfucked so great last night by my woman.
by bi9gus dickus October 14, 2018
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When a person comes up with ANY excuse possible in order to just NOT tell the truth out of sheer stubbornness.
She totally underfucked herself so hard when she refused to just let them know that she had mononucleosis instead of covid, what a stubborn bitch.
by JT Gary December 12, 2020
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