1 definition by Mr.Ladner

Top Definition
A very, very, very, small amount.

Two schools of thought have been debating the original meaning of this term. It is unclear if MouseNuts refers to the size of mouse testicles or the size of nuts that a mouse might eat.
I wouldn't worry about it too much", David said, "it's worth MouseNuts".
by Mr.Ladner July 22, 2010

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