Bat-boner Share definition Flag An erection induced by a climactic and/or arousing scene from any of the Batman films. Batman keeps a spare Bat-boner on his utility belt just in case he has a run in with the Joker. Bat-boner by chode bucket July 27, 2005 0 0 Get merch Get the Bat-boner mug. Buy Now — $32.95 See more merch