After a man jerks off his legs lock up in a fully flexed position. When experiencing this it is hard for a man to move his legs after.

Example: walking, running, sitting

when you're hungover as shit after a spending a night drunk as a skunk

The act of getting so wired on cocaine that your legs start to fail. All feeling is lost to both legs and you must be either carried around or dragged around. High amounts of cocaine must be consumed to reach this state.