collateral whiz Share definition Flag The 5% of a man's whiz missing the toilet, sprinkling over the toilet seat. While 95% of Chad's whiz may have found its mark, I'm worried about the other 5%, the collateral whiz. collateral whiz by Smart Illiterate August 7, 2011 0 0 Get merch Get the collateral whiz mug. Buy Now — $32.95 See more merch