“Brainrot” is internet slang for a fixation so repetitive or silly that it starts to dominate jokes, captions, and edits. This kind of brainrot rap clip spread through short-form meme culture, especially in chaotic TikTok-style videos, where creators pile on fast cuts, exaggerated text, and layered sounds. It stays popular because it instantly signals irony, overstimulation, and terminally online humor. It often appears alongside other reaction-heavy meme audio such as goofy ahh sounds or a bruh stinger to make a punchline hit harder.