DUFF

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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duff

v. To D/F (direction find)
Break out the Yagi, men, as we must duff the illegal transmitter before it shuts down.
by harry flashman August 25, 2003
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duff

Dumb Ugly Fat Friend. Every hot girl has at least one. If, in the case, that a hot girl has other hot girl friends, then they all have at least one mutual duff. Hot girls chill with them to usually make themselves seem better.
Yo dawg, we gotta get this DUFF away asap.
by the_realest_MI February 18, 2011
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duff

consumimg cannabis sativa by means of smoke.
wrestling is coming up soon it's about time to duff
by d-boy May 01, 2003
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DUFF

When you see two hot chicks hanging out with a fatter, uglier woman you can pinpoint this woman as 'the DUFF'. DUFF stands for Designated Ugly Fat Friend. Hot chicks usually have a DUFF to make themselves look even better, when compared to their DUFF.
"That DUFF will make anyone look good."
by SmartyTarty August 16, 2015
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duff

'I just had Duff ..... and it was the best sex ever' !!
by Eeevil March 14, 2003
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duff

Designated ugly fat friend. The girl (or guy) in a circle of friends who is usually the least attractive in the group. Usually the one who provided the ride, designated friver or paid cover charge for the others.
by xzybit November 29, 2005
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