Duff

the ugliest friend in a group to make everyone else look better.

Wow, elliot is the duff in that group.

by mobojobo February 2, 2015

duff

faulty, sub-standard

by doof April 23, 2003

Duff

a duff is another definition of a noob; a term used when sombody makes a stupid mistake or does something stupid.

Alex: oh my god my ball hairs itch like hell, man.
Morgan: wait, you have hair on your balls.
Alex: wow, your a fucking duff.

by DJCVans June 30, 2006

DUFF

Dangerous Undercover Foxy Female

damn that girl is a duff!@!!

by AshleyHads May 22, 2005

duff

designated ugly friend.- the girl no guy wants to have.

This girl will usually get ignored when out with her hot friend and may be so ugly the wingman won't even touch her- then the cockblocking comes in.

The ugly friend may suffer from some form of facial deformity such as an outrageously large nose which prevents them from anyone finding them physically attractive.

They usually end up nowhere in life due to their unnatractive looks and may become a stalker so watch out.

wow, her friend is hot but that single mother is a real duff.

by jdjdjd5665 December 16, 2008

DUFF

Duff stands for designated, ugly, fat, friend. In your group there are usually some hot people in there and then there's that one member that is the least attractive and that person get used to get info about other people

Guy at school : dude those girls are smokin except for the other one

Hot Girl in group: is the captain of the football team still single
Duff: yeah
Hot girl: thanks bestie

by perfectsayings February 21, 2015

DUFF

1.Damn, U're Fucking Fabulous: The friend of the popular people that everyone looks down on but is actually fabulous./2.Designated Ugly Fat Friend: The friend of the popular people that goes unnoticed and doesn't seem to exist.

"Ugh, the DUFF is hanging out with her popular friends again..."
"She's fucking fabulous, who are you to prejudge, you unnoticeable twat."

Bianca is fabulous, bitches.

by PensPencilsAndRulers November 5, 2017