n. UN'yun fuk - A woman with a hot body, but an ugly face. Derived from the fact that before you fuck her, you'd like to raise her skirt above her head and tie a rope around it to keep it in place, thereby creating an onion-dome shape.

v. - To actually fuck such a woman in such a manner.
Dopey guy, walking behind woman with hot body: "Whoa, I'd like to get sassy with that chassis!"

Same dopey guy, after seeing same woman turn around to reveal her butt-ugly face: "Damn, an onion fuck! I wonder if she'll let me onion fuck her."
by maximum g August 16, 2007
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the art of taking a girl's long skirt and pulling it up over her head and tying it. then proceding to fuck her while shes trapped in her "onion bag"
"man that girl is so ugly she should only be onion fucked!"
by crazygookfuck May 6, 2007
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When a couple rubs onions all over their body before they have sex in order to make things sexier.
I’m totally going to onion fuck this girl...
by evandagoon April 4, 2020
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a white-french person who uses his white privilege to get what he wants and his french heritage to be a victim when he gets called out
Mika you’re such a goddamn french onion fuck!

God you’re such a french onion fuck (FOF)
by buck3th3ad April 8, 2022
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