dfo 

Done Fell Out. (emergency medical slang)

" Uncle Ben went all staggery and dfo'ed right over there."

dfo by J.E. Walker April 26, 2003

DFO 

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?"

"You seen that recent tierlist by DFO?"
"Yeah man he roasted Messi with that one"

DFO by OutOfContextDFO April 29, 2020

DFO 

Dun Fell Out
Dun Falled Out

It is a fire/EMS term

Ryan just DFOed.

Tom DFOed and the medics came and took him away.

DFO by Tommy D February 17, 2005

DFO 

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.

"I just got back from that customer site and sure enough it was a DFO error...again!!!"

DFO by BrettMan May 19, 2004

DFO 

a short for Darkfall Online.

guy1Have you been playing DFO lately?
guy2Yea I have been playing it like 24/7.

DFO by [Tomppa] April 21, 2011

DFO 

Don't Flip Out

Hit song of TAWSW, said to someone who is flipping out.

Yo man, seriously, DFO

DFO by Okra May 10, 2004

DFO 

An Internet Football page by the name of “DebatableFootballOpinions” who has many corrupt and shameful group chats. Commonly known for asking 14 year old girls to give him head and not being able to handle the truth

Yo man did you see the paedophilic message DFO sent to the person who disagreed with his opinion?
Yes I did, he is faker than Kim Kardahsians ass

DFO by Exposingnoobs May 9, 2020