duff

useless or not worth keeping

that bloody acoustic pinger is duff again

by Barry Grace March 16, 2003

DUFF

Designated Ugly Fat Fuck. A girl that your hot friends bring so you can't get any good pussy.

"Dude, were you able to bang Amy last night?"
"No! I was so mad; she brought her DUFF Caroline!"
"That sucks..."

by Bo C. May 28, 2007

duff

v. 1. to not follow through with plans to meet someone;
2. to ditch a person

We had plans all week to leave town together this weekend, but he duffed me once again.

by BMWBrian October 28, 2006

DUFF

Stand for Dumb Ugly Fat Friend

My friend Dora is a DUFF!!!!!!!

by Rodneyeeee Munch April 22, 2008

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 October 12, 2008

Up the duff

You’re all idiots it means anal sex

She takes it up the duff, because she loves anal

by TheDuffQueen November 5, 2017

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