Nouns is a community-driven NFT project built around daily auctions and distinctive blocky glasses, and noun o'clock has become a playful shorthand for moments when that community gathers or a new Nouns moment arrives. This short brrrrrt clip circulates as a meme sound in that world, rather than as a line from a film, show or song. Its appeal is brevity and attitude: one rapid burst can signal excitement, mock drama or an inside joke without needing explanation. That flexibility has kept it useful in short-form edits, where a single sound can set the tone in over a second.