1. keep or recover one's self-control
get a grip on reality/of yourself
This idiomatic phrasal verb means to regain your self-control after having lost it. Someone might encourage you to 'get a grip' in order to remind you to look at the situation objectively or to ask you to control your emotions. To 'get a grip' is a shortened version of the expression 'get a grip on reality' meaning not to get carried away and to react to reality instead of imagining the worst senario. This is a colloquial, informal phrase. Similar phrases include 'pull yourself together and 'get a handle on things'.