Mud Rinse

The act in which two people take turns shitting a runny one on each others' chests.

Person 1: Why are you ordering extra hot tacos tonight?
Person 2: It's the key to unleashing a 50 caliber mud rinse

Shugging

The act of shitting and tugging at the same time.

Justin: How are you still so happy at 2pm in the office?
Billy: Man I've just been shugging in the work toilets, I would highly recommend it