Chia Pets are novelty terracotta figurines covered in chia seeds that sprout into a green, hair-like coat when watered, and their television commercials made the stuttered Ch-ch-ch-chia chant a familiar piece of American advertising. The jingle was easy to repeat and parody, so it moved from TV screens into comedy sketches, cartoons and online memes, where it now works as shorthand for anything growing, sprouting or suddenly appearing. Its retro charm and instantly recognisable rhythm keep it in regular use decades later.