shameful shitter

contrary to a "shameless shitter" a shameful shitter will hold it in for hours before daring to go into a public restroom, they rather wait 'till they get home or in a case of an emergency they will scout out a lonesome or retreated restroom and proceed to shit and run, but they will do it in a continued state of terror and anxiety that someone will come in and smell their aroma or hear their farts, in such case they will wait for hours until the restroom is clear of people to avoid the "Walk of Shame"

The shame and anxiety one suffers while taking a shit. Often happens at weak moments after you've recently done something stupid.