Sinking the Buick

When someone is driving and the other is performing oral sex on the driver, the orgasm is so intense it causes the driver to lose all control and crash the car.

"Yeah I was showing houses last weekend and on our way to the house I got road head so good, I drove into the lake when I came"

"Dude, that's wild! I remember my first time sinking the Buick with a girl!"