duff

Dark brown or black cannabis remaining in a vaporizer bowl after vaporizing. The duff, which still contains some THC, is recycled rather than discarded by stingier enthusiasts.

Whoa, don't toss that duff, man! I'm saving that to make hash.

by John Woods October 17, 2008

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

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

Duffe

An insult pertaining no certain meaning.

Hello pal, you're such a duffe!

by Cdoer July 11, 2010

DUFF

Dumb Ugly Fat Friend: Usually accompied by the attractive girl that you actually want to talk to.

That girl is so hot, but she has that Duff standing next to her.

by Cody August 23, 2004