In Hexidecimal number 223 is written as: df

Dear Friend

DF, DF, or dfdf, stands for "damn fake, dumb fuck", and is used frequently on fmylife, youtube, and other forums.

It means da fuck

abbreviation of date friend- used as a catch-all term, usually referring to a partner of unknown gender, or likely a non-binary person, or enby.

Abbreviation for the Federal District in Mexico, namely Mexcio City, the capital.

meaning : da fuck df means almost the same thing as "wtf" but,it's more flexible and,you can use it in more than one way.See example.

Dumb fuck.

1)Noun: Dumb-Fuck 2)Verd: Da fuck (the fuck) a lazy typists way of saying 'what the fuck?'

   Dumb f**k

Direct fire

Defensive fire; usually refers to artillery fire called to land close to the allied perimeter; can be fired and recorded in anticipation of VC attack; a 'silent' DF target was calculated fro [..]

  Direction Finding When a radio transmitter is on the air for a sufficiently long period of time, it is possible to trace its position. This is often done by using directional antennas and plotting t [..]

Dedicated File

One of the largest computer graphics production companies in Japan and a subsidiary of Fields.

Acronym for: Delay factor

The nominal frequency resolution (Hz) of a spectrum; the difference between adjacent frequency points; numerically equal to 1/Tspan.

Designated Federal Officer

Designated Federal Officer

dual fuel

Douglas Fir species.

Report file system disk usage, see Section 3.1.2.3

Direction Finder

Direction Finding, generally referring to a primitive radio receiver and instrument on the ground at an airport control tower or a Flight Service Station (FSS). 

Dead Freight

(acr.) (n.) Duty Finder

drill floor; see BDF.