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1.interjection. Accusing someone of bullshitting.
2.can also be used as "go fuck yourself"
A: "I'm going to have to borrow twenty bucks for gas if you don't mind"
B: "Your mother's balls your borrowing my twenty bucks, take a taxi"

In tennis
A: "That last shot was out of bounds"
B: "Your mother's balls are out of bounds! That shot was in"
by floyd33guy July 10, 2010
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