reverse crab 

while having sex, both partners are on all fours, belly up, and join sphincters so the male may shit in the female's anus or vagina, or the male may use a partially excreted fecal phalus in place of his penis.

I pulled out and turd fucked her with a reverse crab.

reverse crab by vuducat January 6, 2008

reverse crabapple 

When Seamus A.K.A SSoHPKC plays the game "Beyond:Two Souls" and takes down a terrorist by wrapping his character's body around their backside, bringing them to the floor and snapping their neck

"Oh man she just used the reverse crabapple on him!"

reverse crabapple by Gam3rbl00d October 21, 2013