Mr. Me Too is a slang coined by the hip-hop group, The Clipse. The Clipse defines Mr. Me Too as: the person that sits there and examines your style and takes a piece of it. It addresses the competitive dude on the street who, when you get this or that they're like, 'Me too.' Essentially, they hawk your style.
Yo, call that cat Mr. Me Too, ever since I rocked the flat brims, he started on that tip.