Pack it in - A way to tell someone to shut their mouth so hard it might f

A way to tell someone to shut their mouth so hard it might fall off. It’s like telling someone they’re the worst and to stop talking.

Your friend said, 'Pack it in, or I'll throw you out of the car.'

Your teacher said, 'Pack it in, or you're cleaning the entire classroom.'

Your brother said, 'Pack it in, or I'll eat your lunch.'