Boomshizzle Share definition Flag It's when there is a convo and then someone shouts out something really random and off topic. All: -talking about football- Gary: I LIKE MEN! Brad: Wow, that was a total boomshizzle! Boomshizzle by Boomshizzle April 16, 2009 0 0 Get merch Get the Boomshizzle mug. Buy Now — $32.95 See more merch