The Indominus Rex is the genetically engineered hybrid dinosaur and main antagonist of Jurassic World (2015), created by splicing Tyrannosaurus, Velociraptor and other animal DNA. Its roar was designed as a deeper, more menacing take on the classic T. rex bellow and quickly became one of the film's most recognisable sounds. Clips of it spread across YouTube edits, TikTok memes and gaming montages, where the short roar works as a universal signal for something huge, dangerous or over-the-top arriving on screen.