‘Bird talk’ (鸟语) literally combines 鸟 (diǎo, 'bird') and 语 (yǔ, 'speech' or 'language'). Though it sounds like it might refer to actual birdsong, in modern colloquial Chinese it’s a humorous, slightly mocking idiom meaning unintelligible or nonsensical speech—like chatter that’s as incomprehensible to humans as birdsong is to most people. It carries a light, informal tone and is often used to describe jargon, rapid-fire nonsense, or speech that lacks clarity or logic.

The term reflects a playful anthropomorphism: just as birds ‘speak’ in ways humans can’t understand, people sometimes talk in ways that seem equally alien—whether due to heavy accent, technical jargon, emotional rambling, or deliberate obfuscation. It’s rarely used in formal writing but common in spoken Mandarin, online comments, and casual criticism of unclear communication.