When a female/male kneels behind a male while he is standing and has an erection. The kneeling person reaches between his legs and grabs his erection like a microphone, pulling it down, then sticking their thumb up his ass with the same hand. Then they squeeze their hand tight, not unlike that of a gas pump handle.
"Last night she gave me the GasPump so much I think Exxon made money."
The act of urinating in a female orifice while achieving maximum penetration. Please do not smoke cigarettes or use your cell phone during this activity. It is not a hazard to your health but it is just rude.
I was so drunk,I couldn't tell if I came or gave her a gaspump.
The act of thrusting the gas nozzle in and out of the tank after filling up in order to remove excess gas in the nozzle to prevent dripping onto the side of your car.
Ron: damn it I always spill gas on my car after filling up
Jeremy: you gotta remember to get all the liquid out with a quick gas pump thrust!
While pumping gas, you try to release the pump trigger at the number you want it to land on in one try. The less risky people release a few cents underneath the target number then pump the trigger until it gets to the number. It is kind of reverse of russian roulette.
Pumping gas this morning, I tried to land on 30 dollars exactly but hit $30.05 instead. I lost gas pump roulette today.