Being unpopular; not receiving much popularity, support, or attention (applies to people, products, works, etc.).
その新商品は宣伝不足で発売直後から不人気だった。
That new product was unpopular right after release because of poor promotion.
その俳優は最近の発言で不人気になってしまった。
That actor has become unpopular because of recent remarks.
不人気の番組は視聴率が低く、打ち切りになることが多い。
Unpopular TV shows often have low ratings and are frequently canceled.