boychout Share definition Flag used to stop someone speaking when you don't agree if someone is talking BS. It's similar to boy stop but instead you do the chout signal when saying it. Fred- The Mets are the best baseball team ever!!! Bob-Boychout!!! boychout by britto945 November 8, 2009 0 0 Get merch Get the boychout mug. Buy Now — $32.95 See more merch