Duff 

To Duff Out; A momentary lapse in reality shown by a vacant stare into a world of blank.

You just duffed out!

Man sorry i didn't hear you i was totally duffing out.

I really duffed out on that one

Duff by Tazan August 22, 2011

Duff 

Designated Ugly Fat Friend

That girl is our duff

Duff by confident black girl January 28, 2015

Duff 

Designated Ugly Fat Friend

That girl is our duff

Duff by confident black girl January 28, 2015

DUFF 

It is a word you use for that one friend that you don't like. It means DESIGNATED UGLY FAT FRIEND

Kim: Ugh why is she always hanging around us
Nicki: Yeah she's just a DUFF

DUFF by Golden_Goddess February 11, 2015

DUFF 

Designated Ugly Fat Freind

Jim: Bob you are my designated ugly fat friend (DUFF)
Bob: I'm not that fat!

DUFF by z108108 February 18, 2015

DUFF 

Dumb ugly fat friend

That dude is the duff of the friend group

DUFF by Tiasg March 8, 2015

Duff 

Designated ugly fat friend

Wow that girl is such their duff.

Duff by Alyssa j. Page is bad March 9, 2015