duff

marijuana that has already been run through a vaporizer at least once.

all i've got left to vaporize is some duff from last week, but we can still get pretty high.

by stoner June 18, 2006

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 August 25, 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 13, 2004

duff

To strike

Geoff pushed me so I duffed him in the face.

by ben October 06, 2003

duff

When a woman has been fertilised by a man. I.e she is pregnant

She is up the duff

by Johan Forssander March 03, 2004

duff

n. an inert substance used to dilute a narcotic such as cocaine.

The substance must be similar in appearance to the narcotic so as to satisfy the suspicions of the narcotic purchaser. The introduction of 'duff' to a narcotic increases the profit margin for the seller if the selling price of the product is not adjusted for the amount of duff introduced.

See also cut

"This shit isn't anything but duff!" A phrase one may use when the narcotic purchased for one's pleasure does not administer the desired effect.

by Oreck December 24, 2005