Definitions by Josh and Jen Wildman

Shartup 

While doing a sit-up when you bring your body up, the pressure on your stomach causes you to release a fart with a very unpleasant steamy surprise.

Dakota had a PT test early that morning, while doing his sit-ups he had the sudden urge to fart but sadly ended up doing a shartup instead...needless to say he had a shitty morning.

Shartup by Josh and Jen Wildman February 7, 2012