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1.
Internet slang, originating from image boards such as 4chan, to denote someone who discusses their offline life (particularly offline relationships or relationship problems) on the board. Derogatory.
OP: help me /b/, my anniversary is tomorrow and I have no idea what to get my girlfriend
Reply: le sigh, gtfo realfag
by fhtagn July 19, 2013
 
2.
The art of actually being a bonified fag.
Person A: Hey, I was wondering if there were any other guys out there that like playing with Barbie dolls? I can't be the only one.

Person B: God help us if you aren't. Also; Realfag.
by /B/oredem July 26, 2009