A project (usually a video game) that has taken so
long to complete that one of two possibilities exist: either the project will never be completed, or in the even that the project is completed, it will be so crappy that it would've been better off
never being completed. The term is derived from Duke Nukem
Forever, the most famous example of this.
I
want Beyond Good and Evil 2 released just as much as the
next red-blooded
gamer, but at this point, I'm pretty sure it's a DNF.