Top Definition
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."
by Takin a big ol dump June 02, 2010

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