get a grip on

get a grip on (oneself)

To control one's reactions or emotions, especially during or after a stressful situation. After losing her job, Jill needed to calm down and get a grip on herself in order to drive home safely. You're not going to be able to think clearly until you get a grip on yourself.
See also: get, grip, on
Farlex Dictionary of Idioms.

get a grip on

Also, have a grip on. Obtain mastery or control over something or someone. For example, Get a grip on yourself or the reporters will give you a hard time, or, as Arthur Conan Doyle put it in Sherlock Holmes (1894): "I have a grip on the essential facts of the case." This expression transfers a firm physical hold to emotional or intellectual control. [Late 1800s]
See also: get, grip, on
The American Heritage® Dictionary of Idioms by Christine Ammer.
See also:
  • get a grip of (oneself)
  • get a grip on (oneself)
  • get a grip on yourself
  • get/take a grip/hold on yourself
  • unburden
  • unburden (oneself) to (someone)
  • unburden oneself to
  • a cool head
  • cool head
  • even keel