get a grip on
...short on, young man. It's not worth to blow top. Get a grip. get/take a grip (on yourself) 使（自己）鎮定下來；控制住（自己的）情緒
Get a grip is correct. But it means more than physical grip such as grip onto something on a bus or subway. It also could mean get a grip on your life, meaning face your life's reality and do something about it.
翻译如下： Get a grip ”on yourself“ 意思是指 to make an effort to control your emotions...