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A ballsack so large and loose that you could rest any number of body parts on it.
That shorty rode the dick bicycle the her meat flaps took a nap on the Ballsack Mattress.

Rob: I'm so Tired I could sleep on the Ballsack Mattress.
Tom: dude, that's gay
Rob: so what. It's comfortable as hell.
by fredman6654 September 08, 2016
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