Definitions by Jeffrey Lebowski, Jr.

Mud Shark 

(noun) A dump taken in the ocean.

See: Speckled Corn Trout, Brown Tarpon, Speckled Cornfish

"I ate a big breakfast, drank too much coffee, and when I was out on the boat later, I had to take a dump... so, I jumped in the water and let loose a huge mud shark."

Mud Shark by Jeffrey Lebowski, Jr. December 9, 2008