look up any word, like rockabilly girl:
 
50.
To strike
Geoff pushed me so I duffed him in the face.
by ben October 06, 2003
 
51.
1.A incognito way to compliment a nice behind without being heard or looked at by the selective the female target.the term started in NJ in the summer of 2007 and is now being used by college students,frat brothers and perverts up and down the east coast!

2.Nice Big round mound of butt that defies the laws of physics.
1.Jimmy have you seen "Billy Duff"? (while pointing out a target)
2.I was strolling down the beach earlier and saw a "Duff".
3. "Duff" to the right!
4. That's quite a large "duff".
by Joemy mckenzanela November 16, 2010
 
52.
To catch a fart in your hand and put in someones face. A duff is similar to a fast ball, however it is not thrown.
Can I duff you?" "Yeah, duff me! Gimme yer duff!
by Andrea, St. Petersburg, FL September 11, 2010
 
53.
the residual left in the bag of narcotics; the powder.
Dude... Where's all the rocks? That's just a bag of duff!
by sophuct72 February 05, 2010
 
54.
A unit of measure that quantifies the rigidity (hardness and gurth) of an erection.
"This girl I destroyed last night was so hot, I swear my dick was pulling seven or eight duffs, bro."
by Pip3s November 02, 2009
 
55.
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
 
56.
Designated Ugly Fat Friend---Usually hangs around extremely Hot girls and DUFF's usually tend to be girls themselves
Bruh do u see dat D.U.F.F. hangin wit Jennifer
by WM-Dawg March 27, 2008