The action of pounding a person's ass to the point their cheeks turn red without slapping them.
Yo man I duffed that bitch so hard her cotton picking grandma felt it dog.
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Britney: Oh my god, why is she your friend?
Jessica: I know shes ugly, but shes my duf.
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Designated Ugly Friend - the one obligatory fat chick in every group of hot chicks. see running interference
Damn, all those chicks are hot except for that one. Bailey's gonna take the duff home tonight.
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to demolish, destroy , beat down, kill, or win against an oppenent
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Dufful: A dramatic-ish person, who thinks she's Hilary Duff. The "dufful" people usually are drama queens/kings, cry all the time and get lucky out of bad situtations. Dufful Bitches are self-explaining. Dramatic bitches.
1) Hey, she's such a Dufful Bitch!
2) Stop crying, you stupid dufful kid!
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Duffed (v) - The act of getting used and or manipulated by an attractive, mentally unstable person of the opposite sex. Unfortunately this includes an abundance of flirting, profound mixed messages, and sexual enuendos that don't actually lead to SEX, merely the illusion that it will. The Duff usually ends by the Duff-er getting back together with their original girl/boyfriend, leaving the duff-ee with a killer case of blue balls/dry-gina.
Man, I thought this relationship was going to go somewhere, but really I was just getting Duffed!
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"Dude that chicks UGLY!"
"Yes, she's the duf in the group."
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