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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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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Masturbating, jacking off, spanking the monkey, slapping the ham, whacking off, or beating your meat.
Did you hear that ryan was duffing it in the middle of class the other day?
Duffing it isn't a crime.
to masturbate
This stems directly from Hilary Duff.
I walked in to my dorm and caught my roomate duffing it.
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"Dude that chicks UGLY!"
"Yes, she's the duf in the group."
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