一発屋

いっぱつや【一発屋】

〔堅実さに欠けるがたまに大きなことをやってのける人〕 a one-shot speculator; 《俗》 a one-time johnny; 〔野球の〕 a batter who always swings for the seats (and occasionally succeeds); a home-run hitter; 〔一回だけ活躍して姿を消す芸能人など〕 a flash in the pan.

●最近は 1 曲だけヒットして消え去る一発屋の歌手が多い. Recently there have been a lot of flash-in-the-pan singers who disappear from the public eye after just one hit song.

●最近頭金だけを集めてすぐに倒産する一発屋が増えている. We're seeing more one-time johnnies who go bankrupt just as soon as they've scraped their start-up money together.