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1.
RFN
When tomorrow or this afternoon or later is not good enough: you need it Right Fucking Now.
Hey, you lame hesher, go get that six-pack RFN!
by Ace June 02, 2004
194 55
 
2.
Right Fuckin' Now
Used to describe a situation that needs to be handled without delay.
I need that taken care of R.F.N.
by Clance-man March 13, 2006
7 5
 
3.
RFN
Really fucking nice. The top of the spectrum, above PFN (Pretty fucking nice) and NFN (Not fucking nice).
"Did you take that girl home last night?"

"Yep."

"RFN!"
by MDIGFH March 29, 2009
33 42
 
4.
RFN
Random Fucking Ninja. A term occasionally used in message boards and forums as means of a random assault on another member.
User 1: Stop posting stupid shit.
User 2: Fuck you! RFN attacks!
by Zlda4evr December 05, 2007
7 67