double monkey fist 

the act of forcing both fists into anothers anus, causing a huge goatse hole after about 15 minutes of sustained anal penetration.

Last night she totally ave me the old double monkey fist routine!

double monkey fist by Sam Steine November 20, 2003

Double Fisted Monkey Style 

A discipline of masturbation characterized by extraordinary vigor and skill, as well as enormous genital peril. In trained hands, double fisted monkey style can form a glorious, balanced union between a man and his fingers. In untrained hands, it can lead to genital fracturing, inversion, or worse.

"Dude, Bob tried Double Fisted Monkey Style last night."

"Oh no! I warned him! Did he survive?"

"The hospital said he might eventually recover partial use of his legs. They dug his penis out of a tree two miles downwind."

"That stupid son of a bitch."

Double Fisted Monkey Style by NotAGrillShitter November 13, 2011