Shit's about to hit the fan Share definition Flag A saying used when information is just discovered that will completely change everything. Dude, did you hear that Jane slept with Declan?Are you kidding me? Shit's about to hit the fan! Shit's about to hit the fan by erin348 July 23, 2010 0 0 Get merch Get the Shit's about to hit the fan mug. Buy Now — $32.95 See more merch