Duff

Scottish slang for a vagina

Also means something is rubbish, crap or broken

I'll kick you in the duff

That's totally duff

by Freakosaurus November 19, 2006

DUFF

designated ugly fat friend.. everyone has one to make themselves appear more attractive.. mostly females.. gets on boyfriends nerves

girlfriend- "hey tony lets go to the movies tonight"
boyfriend- "ok cool"
girlfriend- "is it ok if kellie comes cuz she has no friends"
boyfriend- "no that fucking duff cant come"

by banana warrior March 29, 2009

duff

To strike

Geoff pushed me so I duffed him in the face.

by ben October 6, 2003

Duff

the act of locking the door behind you when you arrive to your place to lockout someone who may intrude or barge in unexpectedly.

"Hey did you duff the lock? Yeah man, don't worry I duffed it."

by Pants007 January 20, 2009

DUFF

Dumb Ugly Fat Friend: Usually accompied by the attractive girl that you actually want to talk to.

That girl is so hot, but she has that Duff standing next to her.

by Cody August 23, 2004

DUFF

(Da Ugly Fucking Friend) A term to describe the less attractive females another female will have in company to make her seem more attractive or just a less attractive friend to more attractive female. (Originating in Bear, Delaware)

Jon: "Hey! did you see that girl that just walked by?"

Brandon: "Which one?"

Jon: "The one in the middle bro!"

Brandon: "Oh yeah, but she's only a 6 on a scale of 1-10 without those DUFFs."

Jon: "Yeah her other friends were pretty ugly."

by Boogey Man Brown October 5, 2011

duff

When a woman has been fertilised by a man. I.e she is pregnant

She is up the duff

by Johan Forssander March 3, 2004