RLF stands for "Real Life Friend." This differentiates people you know in real life versus people you know via the internet.
I have been spending most of my time chatting with my AOL friends that I miss spending time with my RLFs.
by Jillian J. July 14, 2008
2 more definitions
another lovely internet shorthand stands for "Run Like Fuck"
There after us we better rlf!
by Ezraic October 03, 2006
a short version of 'real life'
In rlf he wouldn't act like he did in this game.
by Martiine March 22, 2007