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

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

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

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

The cannabis material that is left after vaporization (which it is still good for cooking).

I made awesome brownies with the duff from last weeks party!

by CaraBeantown January 5, 2014