85
that bloody acoustic pinger is duff again
by Barry Grace March 16, 2003
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86
an unshaved dick or man bush

from the root muff
judging by that guy's hairline...he's gonna have a duff 'down there'
by Brandi McPherson November 11, 2005
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87
Designated Ugly Fat Friend.

Its one person in a group who makes everyone else in the group look better. The duff doesnt have to be ugly or fat.
Hannah is clearly the duff of the group!
by Shortneyyy😛✌🏻️ June 15, 2015
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88
Dumb(or Designated)
Ugly
Fat
Friend
But really, those describing words do it an injustice. Every group of friends has a duff. the one who's approachable, a little less popular or pretty, and doesn't quite fit in. But the friends in that group also have more friends, and could be their duff. So in reality, we are all duffs.
A boy in my grade called me a duff before I knew what it meant. I found out two seconds later from a girl next to me, that it meant Dumb, Ugly, Fat friend. But she also said that I'm none of those things, and what he had said was highly redundant. (She started laughing and said really loud,"But he probably doesn't know what duff means either, and that a few of those words perfectly described him!")

Duff is also described in the movie, "The D.U.F.F". I recently watched it -for MATURE audiences only- and it gives plenty examples.
by innocence_is_treasured;) August 30, 2015
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89
Designated Ugly Fat Friend.
typically seen at a bar or night club with any attractive female. They are put on this earth for one reason, to cock block. They usualy give you dirty looks while you talk to there friend then tell you that shes to drunk and makes the girl leave.
YOU WILL ALWAYS SEE A DUFF WITH ANY GOOD LOOKIN CHICK!
"Dude i was so gonna fuck that chick tonight but her fat fuckin duff mad her leave."

"God Damn look at that fuckin DUFF!"
by finothebamf August 18, 2008
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90
girl with a big butt or also known as a phatty
"dammnnn she got dha duff"
by noneya624 January 10, 2012
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91
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
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