This sexual act is performed typically by a couple using a double ended dildo inserted into both anuses. From there, they proceed to bang each other, ass to ass.
A.K.A Double Magic, Double Trouble, DRGD
"Hey Scott, are you up for a double reverse gold digger before dinner?"
"That bitch would do anything for that old guy's money; except a double reverse gold-digger."
"Did you just fart?"
"Sorry, yeah, my ass is loosey goosey today."
"Why is that?"
"Kevin and I tried the double reverse gold digger last night."
"How was it?"
"Great."