double domination 

When two female(usually) Doms gang up on one poor male(usually) Sub.

That man is getting the Double Domination treatment

double domination by Donuttouchit August 12, 2018

Double Donation 

While having relations the guy pulls out and ejaculates on his partner and sticks it back in immediately for another round.

OMG! You came already?

Yeah, but I'm about to give you a double donation.

Double Donation by Dank Waffles July 29, 2021