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A two-sided device used for self-pleasure for both males and females. First known Koop-Alla is made of a half gallon milk container and a water bottle.
Scott: I wish my girlfriend didn't break up with me the other night. Now im really lonely.

Ed: If you want, you can borrow my Koop-Alla 500,000. Just clean it when your done.
by Prid995 November 27, 2010
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