Mud rub
The act of shitting on your sex partner and rubbing it all over them, and then licking it all off.
I gave Kate a Mud rub last night.
Pendleton Mud Rub
When someone shits in your lap while your on the toilet and you grab them by the hair and rub their face in it.
"Brad was on the toilet for 45 minutes, so his wife shit in his lap and he gave her a Pendleton Mud Rub"