The Designated (/Dumb) Ugly Fat Friend.
The cock-blocking friend of the hot chick you're trying to hook up with, often the target of the wingman.
I was totally in with this chick and then her D.U.F.F. totally cock-blocked me!
I'll take her, while you distract her D.U.F.F.!
邮件由 firstname.lastname@example.org 发出。我们决不会发送垃圾邮件。