grapist Share definition Flag The definition of a grapist is a man or woman who sticks their fingers between a mans "grapes" and wiggles their finger. Thus raping their "grapes". "Dude, I stuck my finger in his pants and wiggled his grapes!""You fucking grapist!" grapist by Flawl3ssTrag3dy September 8, 2011 Get the grapist mug.