drive by chunder 

An act where the driver pulls over onto the pavement so that his passenger does not chunder in the car.

Passenger generally sticks his head out of the window or opens the door before chundering.

The vehicle does not always need to be in motionless.

Barry was so drunk last night. He did a drive by chunder right outside the Jolly.

drive by chunder by spotted hyena January 13, 2009