holy fa-shizit Share definition Flag A term used when a younger child is in the room, or if you dont like to cuss. Based on the term "Holy Shit" which is much more vulgar. dude1: aww man, i just crapped my pants... (little brother walks into room) dude2: holy fa-shizit! holy fa-shizit by thafranchise94 May 12, 2007 Get the holy fa-shizit mug.