(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."
by Jeffrey Lebowski, Jr. January 23, 2007
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A Type of Shark that are found in the shallow waters of Chichester Harbor - South England. The sharks nest and raise their young, over the summer period, just under the surface of the mud. Mud Sharks normally range between 2-3ft fully grown although their are rumors of 3-4ft sharks that lurk in Bosham Channel. Mud Sharks are generally not harmful to humans except when protecting their young when they have been known to attack children bathing.
"ARGH I just saw a mud shark"
"aaw look at that fish... OH WAIT ITS A MUD"
"Don't let the Mud Sharks get you"
by SharkWatch01 July 18, 2009
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A large, tapered turd, usually in your underpants, resembling a finless shark or other large predatory fish. Usually brown in color. Sometimes speckled. Always dangerous. Attacks underpants unexpectedly.
Holy crap dad! There's a friggin' mud shark in my pants!
by mattypc August 3, 2006
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An insult used by insecure racist individuals to denigrate white women who date members of other, usually darker minority, racial groups.
Dude 1: "That girl is such a mud shark"

Dude 2: “She won't give you the time of day, huh?"

Dude 1: "Yeah, she really hurt my feelings when she rejected me"
by Samurai1833 September 20, 2012
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A turd...
That mud shark really left its mark on the way down... my mom made me clean it up with the brush!
by teawhy701 November 30, 2010
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White man who is particularly attracted to black women.
"Down south, we call fellows like you 'mud sharks.'"
by JRI November 24, 2003
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