Plinentuate Share definition Flag One who is dunderheaded, but presents oneself to be astute; smart aleck. Boy 1: Do you see that guy over there? What a nerd. Boy 2: Yeah, I hate plinentuate bitches. I also hate hypocrites. Plinentuate by Smartdud July 3, 2018 Get the Plinentuate mug.