I'll Tap Your Bonnet

A term used widely by South Africans to exclaim dismay at another road user or offensive person also threatening with violence to follow. Originated from the action of slamming your hands on a car’s hood (bonnet) to get the attention of the driver.

If you continue moving forward and hit my bike, I'll tap your bonnet.

Tapping the bonnet

Hitting it in the rear, in the uk the trunk of the car is the bonnet. anal sex

I had the wife hung over the couch, and while i was tapping the bonnet i think i tweaked a hammy.