bicho Share definition Flag Puertorican slang for the male sexual organ. That guy just pulled out his bicho and pee behind that tree. bicho by Carlos April 13, 2005 Words you can keep railfan mug chonk mug chud mug based mug 67 mug slime mug mogging mug chopped mug thot mug glazing mug huzz mug yams mug larp mug unc mug cracked mug simp mug baddie mug bop mug lolcow mug