Cap became widespread Gen Z slang for a lie, and saying you can smell it turned the insult into a short, repeatable joke format online. The sniffing setup and bruh ending made the clip easy to lift for soundboards and short videos, where it spread as a quick reaction to bragging and fake stories. It sits alongside the classic bruh reaction in meme culture because both use a single flat word to signal disbelief, which keeps the sound useful long after the original post.