Duff (D.U.F.F.) abv. for Designated Ugly Fat Friend; Term men use to describe a fatter, less attractive friend, a woman brings with her to a party or social gathering to make herself look better by comparison. In some cases the more attractive woman will not "put out" for any male, unless one of his friends "takes one for the team" and "hits" the DUFF.

I've settled down with the thought that I was going to Prom without a date. It would just be me and my girl friends. I've never been one to make a big fuss out of something like Prom, so I was perfectly fine with going without a date. Some of my friends however, were stressing out, because they were still looking for a date a week ahead. They even tried to convince me to look for a date. Ya girl just doesn't roll that way.