Peanut Butter Kid Share definition Flag Someone who can't get any and resorts to putting some food object (such as peanut butter) on their junk and has an animal (usually dog) lick it off. "Dude that kid will never get laid" "yeah, he'll have to be a peanut butter kid" Peanut Butter Kid by jerbear. March 11, 2009 Get the Peanut Butter Kid mug.