DUFF

Designated Ugly Fat Freind

Jim: Bob you are my designated ugly fat friend (DUFF)
Bob: I'm not that fat!

by z108108 February 18, 2015

DUFF

Dumb ugly fat friend

That dude is the duff of the friend group

by Tiasg March 8, 2015

Duff

Designated ugly fat friend

Wow that girl is such their duff.

by Alyssa j. Page is bad March 9, 2015

duff

DESIGNATED UGLY FAT FRIEND

Two hot chicks at school they usually have a ugly nasty ass friend but this friend is one that their close with . Say a fit boy walks past the duff of the group they only talk to her to get into her pants

by SMITHY March 17, 2015

duff

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"

by makaaay March 28, 2015

DUFF

Designated Ugly Fat Friend

Bob was a Duff

by prettygangswag12 March 28, 2015

DUFF

(Designated Ugly Fat Friend) A DUFF doesn't always have to be fat or ugly, sometimes a DUFF can be cute, but they're there to make the rest of the group look better and to be the approachable one for anyone seeking inside info.

Man 1: "Hey do you know if that hot girl is single?"
Man 2: "I don't know, go ask her DUFF"

by YolkyYellow March 30, 2015