I'll Tap Your Bonnet - A rude and loud way to tell someone they're a mess, usually

A rude and loud way to tell someone they're a mess, usually when you're so angry you hit their car’s hood like you're trying to make it cry.

I'll tap your bonnet, you clumsy idiot, I almost died because of you!

You think you're cool? I'll tap your bonnet and you'll be in the hospital!

I'll tap your bonnet so hard your car will be out of commission.