enfant terrible

/EH1 N F AA0 N T T EH1 R AH0 B AH0 L/
noun
  1. 1

    An unconventional badly-behaved person who causes embarrassment or shock to others.

  2. 2

    An unusually successful person who is strikingly unorthodox, innovative, and/or avant-garde.

Source: https://en.wiktionary.org/wiki/enfant%20terrible