1 definition by PoopJ9000

Top Definition
= Blumpkin + Cleveland Steamer

The Big Muddy is when you position yourself over a partner and recieve oral while simultaneously deficating on your partners chest.
I gave this chick The Big Muddy last night and man, did I have some bad diarrhea! She still cleaning out her belly button!
by PoopJ9000 June 02, 2011

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