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A term that was popular in the early 2000's and is an acronym for "designated ugly fat friend." In modern day, this term is only used by douches who can't keep up with current slang, and by stupid ass middle schoolers who think they are the shit because of the 2015 movie of the same title that attempted to resurrect the term and make it "cool."
Stupid Person 1: Why is that ugly bitch hanging out with those hot girls?
Stupid Person 2: She must be the DUFF.
by yoloswagturnupyoo February 27, 2015
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Feb 28 Word of the Day
when you got that sauce that's lookin extra fire.
Ayo my homie scott got real nice drip with his louis vuitton bruh.
Damn homie his fit is fire as fuck.
by eggski May 06, 2020
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2
to throw a severe beating to another person or group. Used with mal intent or to beat the ass's of.
"If you don't shut the fuck up, i'm gunna duff your dumb ass"
by DamionFK December 01, 2006
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Two hot chicks at a bar will have a really nasty fat ugly bitch hanging out with them, refered to as a "DUFF".

"Wow that fat DUFF is hanging out with those two attractive ladies, too bad."
by Cobra January 26, 2003
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Designated Ugly Fat Friend

Doesn't necessarily have to be fat, or ugly, but is less attractive than the friends she/he hangs out with. Men/woman usually befriend a duff to get closer to his/her friends. A duff mainly gets used for info and or help, and is often lead on mistakenly or purposely. Do not allow the duff to realize who he/she is and why you are using them, because you will 100% lose them as a friend. If you even care.
Guy 1: "Hey see those hot chicks? Except that one, she's so the duff."
Guy 2: "Yah man? Let's try to be her friend, maybe get some info on her hot friends"
Guy 1: "let's do it!"
by That1DUFF October 03, 2015
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