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A human male phallus. A penis. A variation of the oft-used "Baloney Pony".
Greg: "Hey man, how's it going with that chick you met at the bar a few weeks back?"

Theo: "Solid. I've been on three dates with her. I'm thinking by the next one, I can get her to take a wild ride on the ol' banana horse."
by escapegoat June 10, 2010
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