firedash Share definition Flag Fire dash is originally from a cartoon but something a girl and her boyfriend now use as an inside joke Girl:it's fire dash. My name is firedash Boy:ummm I'm a piro fox (Inside joke) firedash by Therealfiredash October 12, 2017 0 0 Get merch Get the firedash mug. Buy Now — $32.95 See more merch