Ballsiere Share definition Flag A brassiere for your balls (boxer briefs that support your package) Hanna: Wow, Andrew's package looks greatJoe: Ya, cuz he's wearing a ballsiere. Ballsiere by AndrewsPACKageofWISDOM!!!!! April 19, 2011 0 0 Get merch Get the Ballsiere mug. Buy Now — $32.95 See more merch