phenom
From Longman Dictionary of Contemporary Englishphenomphe‧nom /fɪˈnɒm $ -ˈnɑːm/ noun [countable] American English informal a phenomenon(2) a 16-year-old guitar phenomExamples from the Corpusphenom• Van Poppel, the former phenom, has yet to cash in on his vast potential.• an 18-year-old tennis phenom