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"
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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."
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Designated, Ugly, Fat, Friend - this is a person in a friend group who is there to make everyone else look good.
girl 1: she doesnβt fit in with that friend group!
girl 2: yeah because sheβs the duff!
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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!"
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A real term used in the heydays of Cocaine frenzy, 70s, 80s. Duff refers to that portion of your cocaine that consists of powder only, usually full of cut or anything else but real cocaine.
Shit, I won't buy from that dude again, this is all duff.
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