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1.
Incredible Flying Mobile Unit
*Car goes up pole*
DAMN THAT'S AN IFMU!
by IFMU January 25, 2012
 
2.
I.F.M.U. ; Internet Fucked Me Up
Used when internet-related things make you think of the wrong thing IRL.
"Man, that's barely legal!"
">_< IFMU!"
by DTMDTM November 23, 2007