that'll be the day

短语

发音

UK /ˌðætl̩ biː ðə ˈdeɪ/
AU
US /ˌðætl̩ bi ðə ˈdeɪ/

释义与例句

phr.
  1. 1.

    Said in reply to something that one believes will never happen.

    新西兰 习语 非正式

    I’m going to get into work on time today. — That’ll be the day!

词源

Originally referring to a significant day in the future regarded as worth waiting for.

来源：wiktionary