Moo Deng is a pygmy hippopotamus who became a worldwide internet sensation in 2024 after videos from Khao Kheow Open Zoo in Thailand showed her playful, energetic and sometimes feisty behaviour. Clips of her bouncing, squeaking and playfully snapping at her keepers spread quickly across TikTok and other social platforms, turning her into a beloved meme and mascot for cute animal content. Fans still reuse Moo Deng sounds because they instantly signal something adorable, chaotic and light-hearted, even for viewers who have never visited the zoo.