When a student uses Chegg for homework and blindly copies homework without knowing what they're doing. Then when they take a test their work looks just as bad or worse than diarrhea.
Professor: This student's test looks awful. He must have used Chegg because it looks like Cheggarrhea.
the bowel movement (especially in porn) when a woman poops out the liquid injected into her ass by anal sex. It looks like diarrhea, but it's all jizz
the porn star's gang-bang scene was capped off with a nice case of cumarrhea when she was flipped right-side-up and pooped out all the cum her group gave her
Online rhetorical spew, particularly in a chatroom, usually by someone suffering Online Personality or Online multiple personality disorder- Like diarrhea of the mouth, only in text form.
In a chatroom, Amber is talking about everything from politics to killing vietnamese people with a chair, to baking cakes for Jesus on Christmas. Is she okay, or suffering from Chatarrhea?