Look a gift horse in the mouth
指對別人給予的好處或恩惠吹毛求疵。
批評對恩惠挑剔
英文釋義
To find fault with something that has been received as a favor.
例句
She complained about the free tickets, which is looking a gift horse in the mouth.
典故來源
源自馬匹交易,看牙知齡,但禮物馬不應(yīng)挑剔,比喻不領(lǐng)情。