When a person is lying on the ground, and you grab his legs with your hands and press your foot into his testicles like a gas pedal while pulling on his feet. Sometimes this can be combined with the yelling of "GAS PEDAL!"

when someone pushes a guy to the ground and grabs both of his legs and pushing against his penis while jerking his legs towards you. can be perfected by screaming, "GAS PEDAL!"

When you put your mouth to someone's butthole, step on their foot causing them to fart, and then inhaling the gas.

When one presses one's foot against another person's crotch really hard. Usually when the other person is on the floor, and the standing person holds both legs.

Source of the term unknown. A variant where both are lying down is known as the Japanese Gas Pedal

While your buddy/enemy lies on the floor on his back, you grab their ankles, lift their legs to the height of your shoulders, and you plunge your foot as deeply into their crotch as possible.

The act of pulling someone's legs and pushing your foot onto their balls as they're lying down, as if they were using a gas pedal.

Invented in North Carolina by a non-Portuguese man, it is when you are having sex with a woman doggy style and when she reaches climax you pull out and kick her in the pussy.