see a man about a dog
離開一會兒，通常是為了完成或處理某件事情
口語·幽默或委婉地離開
英文釋義
to excuse oneself to attend to a personal matter, often used as a euphemism for going to the bathroom
例句
I have to see a man about a dog, I'll be right back.
典故來源
19世紀(jì)英國俚語，原指處理私事，后演變?yōu)樯蠋奈裾f法。