Originally a term coined by Nietszche and often quoted out of context to (mistakenly) "prove" his support of the Nazis. The ubermensch, or overman, is man at his fullest potential. Man is but a rope stretching between two craggy mountain peaks - on one side stands animal, on the other stands the ubermensch. When man completely overcomes his animal side, then he has metamorphosed into the ubermensch. (sexist, I know - just substitute the word "person" for "man" and you'll be ok.)