DUFF

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

by Golden_Goddess February 11, 2015

come up duff

A person who was a duff in their past and is now a hot glown up masterpiece

Guy 1: Damn heathers a come up duff!
Guy 2: Yah she used to be really ugly but now I really wanna date her

by Em's definitions August 14, 2017

Side Duff

(1)When you are/are not in a relationship. and have a person you fuck on the side. Side duffs manly are just people who you don't really care about, but just only to fuck.

(2) Someone who likes/loves you a lot and buys you stuff and is always promised sex, but never get any in return.

(1) monica was Bill Clinton's Side Duff

by Pititfulfilth April 1, 2011

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 February 24, 2009

Duff

Designated Ugly Fat Friend

That girl is our duff

by confident black girl January 28, 2015

Up the duff

An old Australian Slang term referring to an unplanned pregnancy, first used in 1941 and all the way through to around the 70s. Rarely used now a days.

Person 1: What is happening to her?
Person 2: She's up the duff.

by Shen Bapri March 23, 2023

Duff

A person who doesn't do anything productive with their life after high school - no job, no school, just vibes. Can also describe the act of being unproductive or lazy in general. The word originated from the last name Duffey, a kid who famously did absolutely nothing post-graduation.

Used as a noun:
"Don't be a duff — at least try to apply somewhere."
Used as a verb:
"I was just duffin' it all weekend, didn't move off the couch once."
"He's been duffing his life away since senior year."
Used as an adjective:
"That's the most duff thing l've ever seen — unemployed and still
Lplaining."

by Duffer555 July 21, 2025