Definition
Used to advise someone not to expect something to happen soon or at all, suggesting it is unlikely to occur.
別期望了
They said they might promote me, but don't hold your breath.
他們說可能會提拔我，但別抱太大期望。
He promised to help, but don't hold your breath waiting for it.
他答應要幫忙，但別指望他會做到。
She said she would consider the proposal, but don't hold your breath.
她說會考慮這個提案，但別抱太大希望。