when you are trying to sleep, but your stomach is bubbling and groaning like you are about to shit all over bed. But you lay there thinking that it is going to go away. It ends up keeping you on edge all night in fear of waking up in your own shit.
Al had such a bad case of intestinal insomnia that he was up all night scraping (casino flavored) shit off of his sheets.
Jared's girlfriend woke up to the sound of his stomach growling, then went back to sleep realizing that it was just his intestinal insomnia acting up, but she knew that he would have to take a Jared poop on the way to work.