P and F Syndrome Share definition Flag Mispronunciation of people between the letters P and F, where they pronounce P as F, or vice versa...which is annoying. I have a ("fi" and "ep") p and f syndrome, and that's ferfect, now I'm fofular! P and F Syndrome by pnfsyn August 30, 2010 0 0 Get merch Get the P and F Syndrome mug. Buy Now — $32.95 See more merch