A common term used to describe somebody who has a mustache on their ballsack. It is a birth defect and it can not be fixed with surgery.
Person 1: "what is this mustache on my balls?"
Person 2: "certainly it is a ballstacio"
Person 1:"certainly"
Person 2: "certainly it is a ballstacio"
Person 1:"certainly"
by apieceofshit April 21, 2011
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