Read more at the separate article for Pants.
Angry Grandpa occasionally craps his pants in some of the videos on-camera. When this happens, he usually exclaims "Oh God I shit myself!" or "I shit my pants!" This happens usually when he tries to fart but he accidentally craps his pants, is extremely angry to the point where he pooped himself, or after his son Michael pranks him making him poop in his pants. Some instances for example are when Michael pranked him with fireworks while he was asleep and he exclaimed he pooped his pants, when he tried to fart at a BP gas station but sharted instead, while fixing his kitchen sink he realizes he's gotta go take a massive dump and tries to go to the bathroom but pooped his pants before he is able to make it, and shits his pants during a Q&A interview.
- Angry Grandpa does not care if he farts in public, or in Michael's face, but when he manages to poop himself in the process he's quite embarrassed.
- Angry Grandpa is hardly ever subtle about it when he shits himself; he simply just makes it obvious by either smelling horrible, grabbing his butt to try to keep more shit from coming out his butt and running to the nearest toilet, or yelling that he just pooped himself.
- Angry Grandpa first pooped himself on camera (or so he claimed) was when Michael collided with him while riding a bike.
- On one of Michael's video's "Angry Grandpa Sharted" Michael explains while he and Grandpa were waiting in line at a BP gas station Angry Grandpa tried to fart but accidentally pooped himself in front of everyone in the gas station.
- Michael often makes fun of him for shitting in his pants. When they traded channels, Michael acted like Angry Grandpa and makes fun of how he always pooped his pants.
- In "GRANDPA FARTS IN SUB STATION!!" from July 2016, Grandpa and Michael were visiting Derrick at Sub Station again. At one point, Grandpa farted so bad that all the customers left the place. The stench was so bad that people even left their phones just to escape from it. This was the first time Grandpa's fart has cleared an entire room, according to Michael.
Videos that Angry Grandpa has pooped himself in: