When a person is taking a crap that starts out as diarrhea then suddenly turns into fat turds
Tim: "You were in the crapper for a while did everything come out ok?"
John: "No it was terrible i shit everywhere, it started out runny and then it randomly turned soil."
Tim: "Ah the 'ol runny chucky."
A rule that states, "I might have stolen your joke, but I said it louder and more people laughed, therefore it is my joke." First coined by the infamous Chunky.
Guy: Hey you stole my joke
Other guy: Sorry bro, Chunky's Law