MrMantis Share definition Flag A MrMantis is a guy that can snatch any man he chooses swiftly like a mantis catching prey. "Dude can I call you MrMantis because that guy sucked you off so fast" MrMantis by Mantis138 November 6, 2017 0 0 Get merch Get the MrMantis mug. Buy Now — $32.95 See more merch