Duff

Designated ugly fat friend

Wow that girl is such their duff.

by Alyssa j. Page is bad March 9, 2015

The duff

Designated ugly fat friends

That one friend group that everbody avoides for obvious reasons

The people that sit near the benches at school are the Duffs of school

by Smonky August 21, 2021

DUFF

It means "Designated Ugly Fat Friend". They don't have to be any of those, but that doesn't mean they don't have friends more attractive than them. The DUFF is basically the least attractive one in the group.

"She's cute, but her friends are hotter. She must be the DUFF."

"He's the youngest in the team and acts as the Gatekeeper to the rest of the team. He's a DUFF."

"That teacher is being left out from other conversations... He's a teacher DUFF."

by WattpadBlogger September 21, 2017

Duff Buck

A currency used by 8th grade students on the Hawks side of Chichester Middle School that Mr. Bryan Duffy created during his time teaching for his students to earn and purchase valuables such as buying extra credit points on the final exam, buying a homework pass or a mechanical pencil.

Student: I would like to use a homework pass
Mr. Duffy: *Takes the Duff Bucks and marks as complete*

by VinnySarge June 10, 2025

Duff

Designated Ugly Fat Friend

Usually the unattractive one in a group of friends. Basically the outcast

All my friends are beautiful, this means I'm the duff😭😔💔

by Starbeauty November 28, 2020

Mickey duff

Mickey Duff was a well known boxing promoter whose name is now universally used as rhyming slang for marijuana.

Mickey Duff = Puff

If you want me to roll one up you’ll have to pass me my Mickey Duff.

by Loftier January 23, 2021

Duff Brain

An Über fluky dudely/dudette, that drinks to the point of being a problem for others. He/she somehow gets girls/dudes even though they either have a pencil for a penis or the chesapeake bay tunnel for a SNATCH. Aswell as being a drinker, they have terrible hair cuts, and think that they rule every city they find their way into.

Can be used as a Noun or Verb.

Drinks of choice: Fortays (40's), Vodka in a 2 liter, or colt 45
Music: Bad Euro-trash House stuff
Permanent residence: Ocean City, MD or NJ

1. dude one: "Dude, why the fuck did we bring brent.... he is duff braining so hard tonight... it's funkin' ruining my night."

dude two: "I know, it's my bad, but you won't have to see him again till next summer."

2. dudette one: "Ugh, you are way to drunk Brittany, you are a funkin' duff brain and you even knew I wanted that kid..."

dudette two: "OMGEEZ WTF alls I was gonna do was willis with him all night."

by brew thru her August 29, 2012