Mud Locker 

The inside of the anus, usually containing a slight brown mud-like liquid or solid. Sometimes referred to as a turd cutter or poop shute.

Chris gently inserted his finger into my mud locker.

Mud Locker by Wolfedout October 5, 2016

Mud Licker 

When you shit on a girls tits during intercourse and you lick it all off.

My dad is a huge mud licker

Mud Licker by Mud licker April 19, 2017