Top Definition
Akin to the Mud Shark; but younger; A white girl who dates black men only. In the early years of initial dating a girl shows traits of being a mud hunter.
That Mud Guppy will turn out to be a Mud Shark some day.
by Jonathan G May 28, 2006

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Another term for sperm that has been deposited into an anal cavity
Bob deposited a load of mud guppies behind ted's turd cutter last night.
by ben November 12, 2003

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