Shy Rectum Share definition Flag 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 by CQP August 25, 2011 0 0 Get merch Get the Shy Rectum mug. Buy Now — $32.95 See more merch