paint your room red - A loud way to tell someone they’re going to be so embarrasse

A loud way to tell someone they’re going to be so embarrassed, their room will look like it was drenched in blood or ketchup.

You're gonna be so embarrassed, you’ll paint your room red.

Paint your room red and then try to walk past me.

If I hear one more stupid comment, I’ll make you paint your room red.