see a man about a dog

Từ điển tiếng Anh - Cambridge Advanced Learners Dictionary

see a man about a dog idiom informal
Someone might say they have to see a man about a dog when they do not want to tell you what they are really doing, especially when they are going to the toilet
• I've just got to see a man about a dog. I'll be back in a minute.
Thesaurus⁺: ↑Urine and urinating ↑Bodily fluids and their production ↑Excrement and its excretion
Main entry: see_idiom