TIDAUSFM Share definition Flag An internet slang abbreviation for 'This Is Definitely An Unfortunate Setback For Me'. Also a parody/alternate form of the FML. Ahhh I got in a car wreck today. TIDAUSFM! TIDAUSFM by 240TShead September 3, 2010 0 0 Get merch Get the TIDAUSFM mug. Buy Now — $32.95 See more merch
