钓鱼 (diào yú) literally means 'to hook fish' — 钓 (diào) means 'to fish with a hook and line', and 鱼 (yú) means 'fish'. Together, they form a common verb meaning 'to fish' in the recreational or subsistence sense, not fishing by netting or trapping. It emphasizes the activity of using a rod, bait, and patience to catch fish, often for sport, relaxation, or food.

This word is widely used in everyday speech and writing, especially when describing leisure activities, outdoor hobbies, or childhood memories. While it can refer to actual fishing, it’s also frequently used metaphorically — for example, in internet slang like '钓鱼帖' (a post designed to provoke reactions, literally 'fishing post'). However, in standard usage, 钓鱼 always implies intentional, active engagement with fishing gear and technique.