noun
popular person; person in vogue
Refers to someone who is currently fashionable or in the public eye, often in entertainment or media contexts.
彼は今、テレビで一番の流行児だ。
He is currently the most popular person on TV.
Compound of 流行 (りゅうこう, 'fashion, trend') and 児 (じ, 'child, person'), literally 'trend person'.