A "lot lizard" is a slang term primarily used in the United States to describe a prostitute who works at truck stops and rest areas, soliciting sexual services from truck drivers. This term is often used derogatorily and is associated with truck stop prostitution, which tends to occur mostly at night but can happen during the day as well. Lot lizards may seek clients by approaching trucks or communicating over CB radios. Some are victims of sex trafficking and face harsh and coercive circumstances. The term has also been used more broadly to describe a low or stupid person or a customer or salesperson at a used car lot, but its most common and recognized usage is related to truck stop prostitution. The expression was popularized by a 2000 novel called "Sarah," which is a fictional account of the life of a truck stop prostitute. Truck drivers and others in the trucking community sometimes use the term in a jocular or dismissive way, but it reflects a serious social issue involving exploitation and human trafficking. In summary, a lot lizard is a truck stop prostitute, usually implicated in difficult social realities such as trafficking and exploitation. This definition and explanation come from multiple credible sources on the topic. If you would like, I can provide more detailed information about the context, risks, or social issues related to lot lizards.