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A term referring to an abnormally large, or "donka" sized, male member. Often difficult to conceal, this phenomenon is said to exist in one out of every ten African males, mostly of Ghanian origin.
"Excuse me sir, your donkapenis is showing."

Hana: "Henry! Put your donkapenis away!"
Henry: "I can't it's so difficult to conceal!"
by hanselmania237 October 18, 2009
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