大气不敢出

大气不敢出:

Literally means:

hold one's breath tightly

Actually means:

It means that, to keep quiet or not to be noticed by others, one breathes softly or gently so as not to give out the sound of breathing.

It is used to describe the extreme fear, nervousness, or fright.

指为了保持安静或不让别人发现，轻轻地呼吸，不敢发出呼气的声音。

形容非常害怕，十分紧张，或受到惊吓的样子。