Designated Ugly Fat Friend an unattractive female who accompanies a group of females to either:
A. make the others feel better about themselves
B. gain access into an a social circle she would never be able to attain
Man, I was talking to this really cute girl. Next thing I know, her DUFF arrived and cock-blocked me!
Duff
Designated. Ugly. Fat. Friend Ex. Britny is the duff in the group
Lisa and jen are hotties or the atravtive one and britney is ugly and fat compared to them
It can be guys (not alway ugly or fat) lets say they are freshmen and are like wingmen to upperclass men *They are the ones who the girls go to ask if the jocks or alist guys in the group are single
The 2015 movie "Duff" is about a girl who is the duff in her group of friends at highschool who was unaware that she was the duff and was set oit to change it