A feeling that comes usually after a bender when you cannot remember exactly what you did but are sure it was something bad. The feeling is exaggerated when someone who was on said bender with you tells you exactly what you did.
1. Fuck I was blind last night, I can vaguely remember smashing the neighbours car, I have a case of the piss guilts.
2. Fuck you were blind last night, Do you remember when you smashed the neighbours car, You should have the piss guilts.