碰头 literally means 'to bump heads', but it’s used idiomatically to refer to a brief, informal meeting—often unplanned or for quick coordination. The character 碰 (pèng) conveys contact or collision, while 头 (tóu) means 'head'; together, they evoke the image of people coming together physically (and mentally) to exchange ideas or align on next steps. It emphasizes efficiency and informality—not a formal conference, but a huddle, stand-up, or impromptu chat.

This term is widely used in workplaces, student groups, and everyday planning. It often implies shared purpose and immediacy: participants are expected to be prepared, concise, and solution-oriented. While originally colloquial, 碰头 is now standard in both spoken and written Chinese, especially in emails, messaging apps, and team settings. It’s rarely used for solitary reflection or long discussions—its core idea is mutual, real-time interaction.