The term "dirty old man" is often used to describe an older man who has a perverted or lecherous interest in younger women. However, there are several synonyms for this term that are less crass and more politically correct. Some possible alternatives include "creepy old man," "lecherous gentleman," or "sexually inappropriate senior." Other options might include "perverted older man," "lewd elderly gent," or "sexually aggressive elder." Ultimately, the best synonym for "dirty old man" will depend on the specific context in which the term is being used, as well as the tone and style of the writer or speaker.