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2.
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.
by Tommy D February 17, 2005
35 27
 
1.
dfo
Done Fell Out. (emergency medical slang)
" Uncle Ben went all staggery and dfo'ed right over there."
by J.E. Walker April 26, 2003
94 32
 
3.
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!!!"
by BrettMan May 19, 2004
38 36
 
4.
DFO
a short for Darkfall Online.
guy1Have you been playing DFO lately?
guy2Yea I have been playing it like 24/7.
by [Tomppa] April 03, 2011
7 6
 
5.
DFO
Don't Flip Out

Hit song of TAWSW, said to someone who is flipping out.
Yo man, seriously, DFO
by Okra May 10, 2004
8 36
 
6.
1)The Man.
2)Author of Lewin and Lover
"D Fo...you're the man."
by Anon1234 May 10, 2005
16 51