IYFYUS Share definition Flag In Your Face You Ugly Shit. Commonly used in British chat rooms. <Mr_Joe> I bet you don't have a penis <Karekon> I HAVE 50 <Karekon> IYFYUS IYFYUS by dsnchntd July 28, 2010 0 0 Get merch Get the IYFYUS mug. Buy Now — $32.95 See more merch
