until the cows come home

(副詞) 一段很長的時間 (for a very long time)。

• “Hey dad, when are we gonna be eating dinner?” (嗨，爸，我們什麼時候吃晚飯?)
  “Not until the cows come home, son. Where the hell are your mother and sister? I’m hungry too.” (不久就可以吃了，兒子。你媽跟你妹妹到底去哪裡? 我也餓了)