FCFP Share definition Flag Acronym standing for "Fat Chance, Fancy Pants", to denote disagreement or the unlikelihood of success, akin to "No Way, Jose." Usually used in texting/IMing. I can drink six beers in a fifteen minutes." "FCFP" FCFP by Mypalron August 7, 2010 0 0 Get merch Get the FCFP mug. Buy Now — $32.95 See more merch