Top Definition
1. A phrase used to determine the weight and value of a persons intellect through the scope of their ability to mash a given amount of bananas within a given time.

2. Commonly used in the event of a person doing something which is obscene and repulsive.

3. Conor.
"Why are you such a banana masher?!"
by Capt. Jezebel Starion September 13, 2005
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