When the scene of a shart is left unattended over an extended period of time the sharticles, or particles of shart begin to harden due atmospheric exposure.

This results in the shart forming a thin crusty lining in the jocks which although uncomfortable, is sometimes preferable to admitting to having performed the initial shart in the first place.
"I knew I should have changed after that shart. Now I've got hardening of the sharteries."

"Madeline is walking a bit gingerly today, maybe she's got hardening of the sharteries..."
by turdmeister July 14, 2009
Get the Hardening of the sharteries mug.