What does it mean...?

Hello Guys!
I would just want to know what does DNF mean? I searched it up on the internet but it doesn’t fell right so I am going to ask you guys!
Yes,
You,
Yes,
Im talking to you
Please help me by replying

And I mean in Halo 4 so its not just random by the way

Did Not Finish.

Happens when you quit a match early, get booted or disconnected… Also seems to happen when there’s a lot of host switching during a match because I’ve got several against me despite never being kicked and only leaving early once.

Ok Thanks very much

Did Not Finish, like Centauratron said.

It does happen unfairly in Halo 4 quite a lot, as well, for some reason.