bounce back phrasal verb ( see also ↑ bounce )
1 . to feel better quickly after being ill, or to become successful again after failing or having been defeated SYN recover :
The company’s had a lot of problems in the past, but it’s always managed to bounce back.
2 . if an email that you send bounces back or is bounced back, it is returned to you and the other person does not receive it because of a technical problem