Place this clip at the end of a boastful setup, then follow the reaction with the nope meme sound button for the shutdown, or precede a tactical gaming sequence with the bomb has been planted sound button to build the stakes first.
About this sound
This is a short spoken line from Metal Gear Solid V: The Phantom Pain where a character is told, maybe you're not the Big Boss, delivered flatly in about three seconds. It feels deflating and quietly funny, cutting down bravado with a single doubt that lands like a dismissal rather than an argument.