Don’t hold your breath

“Don’t hold your breath” is an internet slang term that is used to express skepticism or doubt about the likelihood of something happening. It implies that the person shouldn’t expect the mentioned event to occur anytime soon or at all. It often implies a sense of pessimism or a belief that the situation is highly improbable.

Examples:

1. If you’re waiting for him to apologize, well, don’t hold your breath. He rarely admits his mistakes.

2. You think your favorite band will release a new album next month? Don’t hold your breath! They’ve been on hiatus for years.