1. remain cheerful or positive in a difficult situation
come on, keep your chin up!
This expression, which can also be shortened to 'chin up,' is used to encourage somebody to keep trying and to stay positive when experiencing difficulty. It references a person's tendency to drop their chin towards their chest when upset or down about something. While it is spoken in the form of a command, it is never used negatively as it is meant as a friendly piece of advice or encouragement. The term is common in both a social and professional context, and shares a similar meaning to the phrases 'hold your head up high,' and 'keep your head up.'