Gas-brakin. v. 1. the art of driving by pressing the gas pedal more than you should, then the brake pedal over and over, instead of just using cruise control; causing everyone in the car to get car sick even if they do not get car sick. This usually leads to everyone being very mad and the in-experienced driver.
"On the 4hr drive to the airport, I thought we were all going to kill Josh. He was gas-brakin the whole trip, even on the interstate!"