fuel pump 

Urinating in a sexual partner's rectum.

Jim: So, did you pee in her butthole?

Matt: Absolutely, I fuel pumped the shit outta her.

fuel pump by Dickfingers785 October 23, 2013

Faulty Fuel Pump

The act of somebody defecating into another person's asshole and after 2 days, they trade. This repeats until a person cannot fit any more in their asshole.

Person 1: Hey, want to play Faulty Fuel Pump?
Person 2: Sure, be prepared to clean up, things are going to get messy.

Faulty Fuel Pump by CrabFucker69 November 28, 2022

afgan fuel pump 

The dirtiest most anal satisfying sex position ever invented. Pioneered in Gunnedah, once you've been fuel pumped you will never go back

I have her the afgan fuel pump

afgan fuel pump by Afghanyyy January 11, 2014

Fuel pumping 

The act of urinating inside of a vagina or anus during intercourse, similar to pumping gas or fuel into a vehicle, Jerry can or other gas/fuel storage device.

"Bro, this chick I picked up last night was hella freaky. She couldn't get off until we started fuel pumping."

"I'd love to give him a real good fuel pumping, if you know what I mean."

Fuel pumping by SFAwesomesauce September 24, 2019