The word 碰头 is formed by combining two characters: 碰 (pèng), which means "to touch" or "to bump into", and 头 (tóu), which means "head". Literally, it paints the picture of heads coming together or making contact. This vivid physical image is then used metaphorically to convey the idea of people gathering for a brief, often informal, meeting or discussion, as if their heads are metaphorically "touching" to exchange information.