uber-

prefix

1. A prefixal use of uber, adverb and adjective, with the basic meaning “over, beyond.” It is added to adjectives and nouns to form compounds (uberstylish; uberchefs): a hyphen is sometimes used in new coinages or in any words whose component parts it may be desirable to set off distinctly (uber-luxe).

combining form

1. indicating the highest, greatest, or most extreme example of somethingAmerica’s ubernerd, Bill Gates; the uber-hip young Bohemians