Crikey was Steve Irwin's signature catchphrase during his career as an Australian wildlife expert and television presenter, rising to international fame in the late 1990s through his wildlife programmes. The word became shorthand for his enthusiastic, hands-on approach to animals, especially crocodiles and other dangerous creatures. After clips circulated online, the exclamation took on a second life as a reaction sound, used whenever something surprising, impressive or slightly alarming appears. Its enduring appeal comes from Irwin's genuine warmth and excitement, which still feels fresh decades later.