Mr. Puniverse Share definition Flag A person who is incredibly skinny and lacks muscle. It stems from the combination of the words "puny" and "Mr. Universe." If I go to the gym and workout properly, I can go from "Mr. Puniverse" to "Mr. Universe!" Mr. Puniverse by ToMess Upton January 4, 2010 0 0 Get merch Get the Mr. Puniverse mug. Buy Now — $32.95 See more merch