duff

The unattractive girl that a hot girl keeps around to make herself and her friends look better. Stands for "Dumb Ugly Fat Friend". THe DUFF tends to be a cockblock or a third wheel. See also "Grenade".

Why do I always get stuck with the DUFF?

by G. Sherman August 11, 2003

duff

a teenage pop star with absolutely no talent.

hillary duff sucks

by hillary's ex April 12, 2004

Duff

Scottish slang for a vagina

Also means something is rubbish, crap or broken

I'll kick you in the duff

That's totally duff

by Freakosaurus November 19, 2006

DUFF

designated ugly fat friend.. everyone has one to make themselves appear more attractive.. mostly females.. gets on boyfriends nerves

girlfriend- "hey tony lets go to the movies tonight"
boyfriend- "ok cool"
girlfriend- "is it ok if kellie comes cuz she has no friends"
boyfriend- "no that fucking duff cant come"

by banana warrior March 29, 2009

duff

To strike

Geoff pushed me so I duffed him in the face.

by ben October 6, 2003

Duff

the act of locking the door behind you when you arrive to your place to lockout someone who may intrude or barge in unexpectedly.

"Hey did you duff the lock? Yeah man, don't worry I duffed it."

by Pants007 January 20, 2009

Duffe

An insult pertaining no certain meaning.

Hello pal, you're such a duffe!

by Cdoer July 11, 2010