Rexy is the fan name for the Tyrannosaurus rex at the centre of Jurassic Park, the 1993 film that made the dinosaur a pop culture icon. Her roar, heard when she escapes her paddock and later confronts the raptors, became one of the most recognisable animal sounds in cinema. As clips from the film circulated online, the roar was lifted for memes, edits and soundboards, where it now works as instant shorthand for size, danger and a dramatic entrance, even for viewers who have never seen the full film.