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An acronym for jet fuel can't melt steel beams. JFCMSB is a reference to the world trade center "attack" on the twin towers on 9/11/2001. Commonly thought to be actually plotted by Bush and blamed on terrorists so that America could get into the Middle East for control and oil.
"Man... today is the day that my mom died in 9/11, fucking terrorists killed her man!."
"Sorry bro but JFCMSB."
"What the fuck really?"
"Yeah, Bush did 9/11 man."
"Sorry I thought we all knew."
*friend joins ISIS*
by "scarface" April 07, 2015
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