Moo Deng, a baby pygmy hippopotamus at Khao Kheow Open Zoo in Thailand, became a global internet favourite in 2024 after short clips of her playful, dramatic behaviour spread across TikTok and other social platforms. Fans turned her expressive moments into edits, reaction videos and soundboard clips, and the pipiripiripipipi chant became one of the lighthearted sounds attached to that wave of content. It remains popular because it captures the same mood in audio form: cute, energetic and a little chaotic, making it an easy shorthand for Moo Deng-style silliness.