A somewhat denigrating nickname bestowed upon Mike Pence due to his weirdly absurd appearance in Iowa today on a growling Harley, designed to attempt to counteract his previously mild mannered persona verging on nonexistence.
Oh look, all decked out in black leather and looking sinfully tan and sexy, here comes Biker Boy Mike on his powerful motorbike!
A person named Mike that is sized neither large nor small, but approximately halfway between the two. Used as a slightly derogatory term as medium implies that this Mike lies in the statistical median of all Mike data.
That kidKeys is acting like a real Medium Mike lately. What a douche.