Person who held their sick belly for as long as theg can until it's their turn to have the bathroom. He shares a bathroom with another roommate who's sick with the same flu and they each get 10 minutes after the other to relieve themselves if they're both needing the bathroom.
He calls out as soon as the 10 minute mark hits. Both of their bellies are having an absolute blowout right now and he's been holding his diarrhea as he clutches his belly with both arms and moan in pain on the couch. "Please come out," he says pathetically as another liquid gurgle reverbrates through is poor bloated stomach, cramping his waist to make him let out some gas. He reaches a hand towards his rear and presses it against his butt, afraid of having an accident. "I can't hold it anymore, I need to shit so bad."
"I can't make it stop!" His roommate yells behind the closed bathroom door. It was half an excuse and half a plea. "It just keeps coming out..."
He groans as another urge to pass gass comes. The other hand stuck pressing against his butt grows warmer, and he feels like he's going to explode from the pressure. His entire belly feels like it's filled with liquid. "Please," he begs, doubling over, even when he knows it's useless, "I can't hold it - I'm so full, hurts so bad, I'm going to shit right here if you don't...!"
He feels like sobbing. He doesn't want to have diarrhea anywhere else, he physically couldn't; they've tried trash bags and diapers to no avail. He needed to sit over the toilet and let the sickness all out, but there's nothing he could do now, so he just curls up, knee against his chest, and cradles his poor gurgling and belching belly, hoping he can hold it all in for another minute.
He's grunting with exertion and drenched in cold sweat when his roommate emerges from the bathroom, equally spent and exhausted. He watched him flop on the couch and mutter weakly "it's all yours." he eyes the toilet across the room in relief before his belly gives another sharp cramp and thick rumble of trapped gas and he realizes: he is never going to make it there without shitting himself.
"What's wrong?" His roomate asks. "Just go. You said you were gonna shit yourself."
"I will," he moans helplessly, curling his body up even closer. "Can't hold it - gonna shit myself if I move..."
"You can make it," his roommate encourages, "better all out than nothing."
He's held everything in for so long, and the burning in his belly along with the angrier sloshing means his own body won't stand it any longer. But as soon as he uncurls from the floor, a sharp cramp hits along with a sudden loud gurgle - his belly squeezes involuntarily, entire body pushing and grunting before he realizes - "hrkk - nghh, shit! Shit!"
A loud burst of gas, followed by hot liquid running down his intestines. His belly feels like it's on fire as he presses his hand firmly against his rear and makes a dash toward the bathroom - feels the chunks of diarrhea stain his hand and spurt through his fingers, and it burns, can't hold it, can't...!
He needed both hands to take off his pants, so naturally all hell breaks loose and he stifles a cry of defeat as bright yellow diarrhea splatters all over his pants and the floor. He didn't even have time to breathe as soon as he sat on the toilet; the spasming is so intense his chin curls into his chest and his torso folds against his lap. He grunts from the sheer exertion, dry heaves in pain as it gurgles and pours and burns. His roomate was right: it just won't stop coming...