Shy Rectum

A condition in which one is unable to take a shit in an unfamiliar restroom.

Dude... I'm only able to take a shit at my own house thanks to my shy rectum. Now, whenever I go on vacation, I always get backed up.

Shy Rectum Syndrome

a sheepish feeling whilst dropping a deuce in a quiet public bathroom with others present

Shy Rectum Syndrome is recognized as a disability under the Americans with Disabilities Act