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A banana flake is a pitiful person that swears incessantly.

Derivation: Banana flakes are used as a safe and cost-effective treatment for diarrhea in critically ill tube-fed patients. When someone swears incessantly, he or she is known as having diarrhea of the mouth.
That pathetic banana flake sits on her porch all day long yelling obscenities at the kids playing in the street.
by InalienableRights June 10, 2011
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