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1.
jfr
Just For Reference

Usually followed by clarification. Used when one does not wish to have angry people ranting at them and when one is too lazy to type three words.
jfr, i don't really hate twilight. it's more like a guilty pleasure i hate having than a real dislike.
by Jackie55 December 27, 2008
 
2.
jfr
Just Fucking Run

just get off your ass & go. it means your excuses are invalid & you need to get up & just fucking run. stop being fat.
John was fat & kept crying about it, Mike told him to jfr & shut up.
by lea j May 28, 2014