Double Pumping 

Using two hands, one after another, repeatedly during male (or for the more advanced user, female) masturbation.

oh it's also a thing in fortnite

Yo, i was double pumping Martha last night

fuck double pumpers, dude.

Double Pumping by Shithead McMuffin July 4, 2018

Double Pumping 

The action of putting your penis in a woman's anal cavity and your balls in her clitoris and then thrusting.

Dude, I met up with Jessica last night and things escalated a little and we started double pumping

Double Pumping by Double Pumping December 2, 2020