Kerb Crawler is a term used to refer to individuals who drive around slowly in search of prostitutes. This term is often used as an insult, and so people may look for synonyms to avoid using the word directly. Some synonyms for Kerb Crawler include "street prowler," "sex tourist," "vice bird," "night wanderer," "lone shark," and "john." These words may be used to refer to the same thing without sounding as insulting. However, it is important to note that soliciting prostitution is illegal, and so it is important to discourage such behavior in any way possible.