Duff

1. Designated Ugly Fat Friend
2. A more polite way of saying ass or butt

1. She's such a Duff
2. My Mom always tells me to get off my duff and go outside

by SauceMilliken July 30, 2017

DUff

Something that tastes nice.

“Oooooo, this chocolate is duff”

“This pizza is duff”

by E L L E T123 December 13, 2017

Duff

V. To plan a sexual encounter and back out soon after, to stand up.

He said he wanted to be with me, but then he duffed out and changed his mind.

by Laurie-Bell February 1, 2009

Duff

DUFF - Designated Ugly Fat Friend.

Doesnt have to be fat or ugly. The weak link in the group of girls. The least attractive but it the most approachable. Use her to speak to the girl in group you want to score with.

"Damn Cindy so hot, how do i even get a chance to speak to her?"

" its simple my friend, get to know her DUFF Sarah & youre in"

by Jamattack March 21, 2016

DUFF

Desiganted Ugly Fat Friend. A common acronym used in male cliques. Used to refer to the girl that the "hot chicks" bring along to distract the "Wingman" (every male clique has one, his job is to intercept the DUFF.) so the ycan have the more desirable males of the group.

"Dude, you sooooo got the DUFF tonight."

by TXwolfman817 October 21, 2008

Duff

Dumb ugly fat fuck

Hey, look over there, it’s a duff, why is they walking over here.

Oh look, there’s the duff, haha

by Thisguy1999 March 13, 2022

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