Duff

Designated Ugly Fat Friend.

Its one person in a group who makes everyone else in the group look better. The duff doesnt have to be ugly or fat.

Hannah is clearly the duff of the group!

by Shortneyyy😛✌🏻️ June 15, 2015

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

Duff is an acronym meaning Dumb Ugly Fat Friend or Designated Ugly Fat Friend.

Generally a cockblocker and a bitch, have a desperate friend take her down.

Friend 1: Dude I want to hook up with that girl, but her duff is in my way.

Friend 2: It may be Amber but i'll take the duff down.

by Jap Anus Relations July 29, 2009

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

To Fart, flatulate, passing intestinal gas, let one go, squeeze cheeks, float an air biscuit.

"Has someone done a duff? It smells in here."

by Animal Muppet June 10, 2009

Duff

D.u.f.f- Dumb Ugly Fat Fuck, only used with girls but can be used with guys if necessary.

That girl at that lunch table eating jello is a fucking duff

by Kevin Derr May 4, 2007

Duff

Designated Unpopular Fat Friend. A fat person,usually a female who is obsessed with a country boy,his friends,his momma,sister,truck and dog.

Girl: Where did all my ice cream go?
Boy: The duff must have ate it.

by brotherman94 February 8, 2012