Gay Duff 

A duff that is the opposite gender of the social group that they belong to.

Person 1: Damn she's fine, I want her number
Person 2: Go ask that guy over there, he's their gay duff

Gay Duff by Overthinking July 8, 2015

Jack Duff 

Jack Duff is an Irish bean from a band called RoadTrip TV. He loves this girl called Mais, mais I love u sweetcorn. he’s fit lol yeet.

omg look it’s Jack Duff with Mais!

Jack Duff by lolimboring October 30, 2019

In the duff 

When you are horny as fuck

Yo bro are you in the duff right now?

In the duff by c0pen September 8, 2020

Up the duff 

When a woman is pregnant.

Elise is probably up the duff by now!

Up the duff by 7bandittt January 21, 2021

Cassandra M. Duff 

A shy, Beautiful young girl. This girl has a short temper, and loves to draw and listen to a small selection of music. With a very adventurous imagination, a very polite attitude, and above average intelligence, she is a very fine young woman.

Warning: Easily irritated by short, pushy boys. May cause bodily harm if tampered with.

"Just leave me alone please!"
"Guys are sooo stupid.."

Cassandra M. Duff by Someone who cares February 11, 2005

Hilary Duff 

Wait... who?

You're saying there was this big Celebrity named Hilary Duff in 2003? Don't recall...

Hilary Duff by Joe Wrider July 25, 2009

hilary duff 

A sweet piece of tail who is now legal.

Now I can spank-it to her pictures without fear of jail!

hilary duff by The Drizzle January 23, 2005