HeadOn was a headache product sold in the United States, and its mid-2000s television commercial became infamous for repeating its slogan three times in a row instead of explaining the product. The blunt repetition made the advert easy to parody, quote and remix, and clips circulated widely online as viewers turned it into shorthand for anything irritating or head-splitting. It has been referenced in comedy sketches and meme edits for years, which helped the phrase outlive the product itself and remain a recognisable reaction sound.