Stinky Fist Bump Share definition Flag When two guys fist a girl, one fisting her vagina, the other fisting her butthole. The fists then meet up in the middle. Forming a fist bump. Bro, me and Daquan gave LeeAnne a stinky fist bump last night. I got the ass unfortunately. Stinky Fist Bump by TBreck March 7, 2015 Get the Stinky Fist Bump mug.