gullybat Share definition Flag a bat that lives in the gully, and cousin of a gullyrat. the gully can be anywhere, preferably in the gully neighbourhood of gullytown. "say i'm feeling for some fried gullybat's wings" gullybat by nuwebe December 19, 2008 0 0 Get merch Get the gullybat mug. Buy Now — $32.95 See more merch