Being or doing something stupid or idiotic. Also, means to slack or fail.
Michael: Wow, you're being a Casella right now.
by BruhBruh123 July 11, 2011
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An awkwardly small, frail man that lives on the business end of a leash with various ball gags and butt plugs in every orifice. The Casella Pet holds the record for storing a light bulb in his ass for the longest period in history without breaking. Once an iconic business man, the Casella Pet contracted Meiselthelioma on a camping trip which caused his desire to become a gay slave living in a box.
Last night Hollywood was bored throttling chicks in the bullpen, so he opened a bottle of Bordeaux and decided to let the Casella Pet out of his box.
by Mac Handy May 23, 2015
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