It is a word you use for that one friend that you don't like. It means DESIGNATED UGLY FAT FRIEND
Kim: Ugh why is she always hanging around us
Nicki: Yeah she's just a DUFF
Abv. For Designated Ugly Fat Friend. Usually the one person more approachable in a group and the one who is less attractive than all the others in the group. Sometimes a girl will approach a DUFF and start to flirt but after a while will begin to ask questions about another hotter member of the group.
Man #1: Dude, that's your job as the DUFF
Man#2: What did you just say to me?
Man#1: You're a DUFF, Designated Ugly Fat Friend.
Man#2: That's so messed up.
noun: The small particles of cannabis, or "shake", in the bottom of your bag of weed.
verb: To remove the shake from finished cannabis buds.
Noun: "Hey check out this pound of Blue Dream I got!"
Looks at bottom of bag, "I don't know man looks like theres an bunch of duff in it.
Verb: "Gotta duff that shit out bro."
"Have these packs been duffed?"
Designated Ugly Fat Friend
Usually the unattractive one in a group of friends. Basically the outcast
All my friends are beautiful, this means I'm the duff๐ญ๐๐
DUFF means designated ugly fat friend
this person doesn't have to be fat and ugly to be a duff they are usually the one everyone goes to for information on one of the pretiter friends in the group
"why doesnt she get invited to parties, because she's our duff"