闲聊 means 'to chat idly' or 'to have a casual, light-hearted conversation' — not about serious topics or urgent matters, but for relaxation, social bonding, or passing time. The character 闲 (xián) means 'leisurely' or 'free from work', while 聊 (liáo) means 'to talk' or 'to chat'. Together, they emphasize the relaxed, unstructured nature of the conversation — often without agenda, purpose, or depth.

This verb is commonly used in everyday spoken Chinese, especially among friends, family, or colleagues during breaks. It implies informality and friendliness, and rarely appears in formal writing or official contexts. You might 闲聊 over tea, while waiting for a bus, or during a coffee break. Unlike more neutral terms like 谈话 (tánhuà, 'to talk'), 闲聊 carries a warm, low-stakes connotation — it's the kind of chatting that strengthens relationships without demanding attention or resolution.