Rusty Mud Shovel

When a woman purposefully holds a bowel movement until her menstruation period. She then let's her boyfriend have vaginal sex, but quickly moves to anal (as to not lose any blood aka rust) and tries to dig a hole into her impacted feces.

Jerry Springer: My wife hasn't shit in almost a month, man.
Steve Wilkos: Well then she's almost due for rusty Mud shovel, huh?