duff

1. Designated Ugly/Fat Friend
a friend that hot girls have to make themselves feel hotter
2. someones butt
1. Every hot girl I see seems to have a duff
2. Get off yer duff and do some work!
by Poopie pants 2 October 26, 2007
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duff

duff
Duff
Designated. Ugly. Fat. Friend
Ex. Britny is the duff in the group
Lisa and jen are hotties or the atravtive one and britney is ugly and fat compared to them
It can be guys (not alway ugly or fat) lets say they are freshmen and are like wingmen to upperclass men
*They are the ones who the girls go to ask if the jocks or alist guys in the group are single

The 2015 movie "Duff" is about a girl who is the duff in her group of friends at highschool who was unaware that she was the duff and was set oit to change it

"Duff " is not a positive thing to be called
by just a teen in 2k15 April 01, 2015
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duff

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
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duff

Generic term for beer. Originates from The Simpsons cartoon series, where Duff is the brand of beer characters drink.
"Pass me that duff". "You bring the weed and I'll bring the duff!"
by Karl Steiger January 31, 2004
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duff

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 06, 2010
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duff

faulty, sub-standard
by doof April 23, 2003
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duff

designated ugly friend.- the girl no guy wants to have.

This girl will usually get ignored when out with her hot friend and may be so ugly the wingman won't even touch her- then the cockblocking comes in.

The ugly friend may suffer from some form of facial deformity such as an outrageously large nose which prevents them from anyone finding them physically attractive.

They usually end up nowhere in life due to their unnatractive looks and may become a stalker so watch out.
wow, her friend is hot but that single mother is a real duff.
by jdjdjd5665 December 04, 2008
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