bête noire
noun [ C ] uk/bet ˈnwɑːr/ us/bet ˈnwɑːr/ bêtes noires /betˈnwɑːr/ /-ˈnwɑːr/
令人厌恶的人（或物）
a person or thing that you dislike very much or that annoys you
My particular bête noire is cigarette butts being left in half-empty glasses. 我特别讨厌有人把烟头丢在半满的水杯里。