The phrase is composed of two parts. The first, 人在江湖 (rén zài jiānghú), literally means “a person in the rivers and lakes.” However, 江湖 (jiānghú) is a crucial cultural concept that refers metaphorically to the world of martial artists in fiction, and by extension, any complex social environment with its own unwritten rules and power dynamics—like the corporate world, politics, or even a particular industry. The second part, 身不由己 (shēn bù yóu jǐ), means “the body is not up to oneself.” It signifies a loss of personal autonomy. When combined, the phrase paints a vivid picture: once you step into the complex “world” (the jianghu), you are no longer in full control of your actions.