Fanshier Share definition Flag A slang name for having a crotch of fire. Has an inquenchable flame that cannot be put put out by any liquid known to man. Jacob's Fanshier evaporated a lake. Fanshier by Jakob3214o23u4h24 June 11, 2011 0 0 Get merch Get the Fanshier mug. Buy Now — $32.95 See more merch