A crippling panic which arises after
taking a shit when you suddenly realize someone is waiting to use the toilet
immediately after you and (a) you left a shit stain in the toilet that can't be removed and/or (b) you left a
catastrophic stench that would choke a horse.
Person 1: Dude, I almost died at Sherry's house. I took a
nasty shit which left a skid mark
on the toilet, it wouldn't come off, and her hot sister was waiting for me to use it.
Person 2: Whoa, dude. That's a
classic case of Post Traumatic Shit Disorder (PTSD)