ballshrinkium Share definition Flag Rare gaseous element, the inhalation of which can cause testicular shrinkage. I'll bet Usher makes Justin Bieber take shots of pure ballshrinkium to delay his puberty! ballshrinkium by NotTheRealJustinBieber March 7, 2011 0 0 Get merch Get the ballshrinkium mug. Buy Now — $32.95 See more merch