Personal Shit 

A shit someone takes while having an emotional breakdown.

I think Sandra was taking a personal shit. The bathroom floor is covered in tears and it smells like death in there.

Personal Shit by superk13 June 23, 2016

Shitty personal best 

An individual is engaged in a strenuous activity and finds himself/herself in GI distress and on verge of defecating on oneself during said activity; individual still completes activity or event in a respectable time frame or other measurement. Used mostly when referring to athletic endeavor.

Runner: yo bitches I was cruising in my relay race on the A1A and rolling so hard I nearly shit my pants; unfortunately I had to ease up. Still ran a good time, it's my new shitty personal best.

Teammates: you better get yourself to a port a potty ASAP before you actually shit yourself. Just saying.

Shitty personal best by OG Baby Giraffe January 9, 2011