DOM means "Dirty Old Man". DOM Juan is a dirty old man who is trying to romance a girl young enough to be his daughter or granddaughter.
Jessica: "Mel is constantly slobbering over all the pretty young girls."
Tricia: "Well, isn't he such the DOM Juan!"
Tricia: "Well, isn't he such the DOM Juan!"
by vivicafox June 7, 2009
Get the DOM Juanmug.