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 January 1, 2008

RFG

Real Fun Gal (or Guy). Someone who will make the night much more interesting.

Are you inviting Shannon? Because she is a RFG!

by Crimson_Koala April 5, 2009

RFU

Remain Fucked Up

Spike: Disco, do you want to RFU for about a week?
Disco: Sure, let's make it two weeks.

by Johnboy Thomas June 7, 2009

rfjnrie

a word that you type in when you are bored of facebook

if you are talking to your friend on facebook just tell them to type random stuff like rfjnrie

by looloola November 1, 2010

RFBG

Russian Facebook Girl

Check out this RFBG who wants to friend me.

by nickG25 October 20, 2010

rfugly

supremely ugly, shorter term: real f##king ugly

Man that guys is so ugly he is rfugly

by shebee October 19, 2005

RFI

RFI = Remote File Inclusion

If a website is vunerable to RFI ( i don't say how to found this ) you can include a PHP Shell and you have root acces at webserver.

Shell (c99,r57,c100 etc.)

www.site.com/index.php?pagina=Link to the Shell

RFI

by 1337_al3rt April 2, 2008