Take a grip on themselves - Idioms by The Free Dictionary
take a grip on (oneself) (redirected from take a grip on themselves)
take a grip on (oneself)
To begin to control one's reactions or emotions after not having done so previously. After losing her job, Pam needed to calm down and take a grip on herself in order to drive home safely. You're not going to be able to think clearly until you take a grip on yourself.
get/take a ˈgrip/ˈhold on yourself (informal) make an effort to control your feelings, especially in a difficult situation: I know you’re nervous, but you must get a grip on yourself. You’re due to go on stage in five minutes. ♢ Look, Ben, get a grip, will you? If we panic now, we’ll be finished.