An Internet Football page by the name of "DebatableFootballOpinions" who also has many group chats (DFO1, DFO2, DFO3, DFO4...). Commonly known for the phrase "Have you ever seen 17 thousand people in a room?"

when you're hungover as shit after a spending a night drunk as a skunk

Done Fell Out. (emergency medical slang)

Dun Fell Out
Dun Falled Out

It is a fire/EMS term

Acronym for "Dumb Fucking Operator". A term most commonly used in the IT industry to describe the most common cause of almost any computer-related problem.

a short for Darkfall Online.

1)The Man.
2)Author of Lewin and Lover