WGCI is 107.5 FM in Chicago, a long-running hip-hop and R&B station known for loud on-air drops and DJ stingers. The station's airhorn became a recognisable shorthand online because the blast works like a radio sweeper, signalling that something important or funny is about to happen. Shared as a short standalone clip for soundboards and edits, it spread beyond local radio into meme videos, streams and reaction posts where creators need an instant hype cue without any words or music attached to it.