The phrase "mad men" can be defined as "men who are crazy, angry, or irrational." There are many synonyms for this phrase, including "insane gentlemen," "angry boys," "crazy boys," "irrational guys," and "crazed men." These synonyms can be used to describe individuals who are behaving erratically or expressing extreme emotions. When looking for alternative ways to describe individuals who are acting in this way, it is important to consider the context in which they are behaving. For example, "insane gentlemen" may be an appropriate synonym for a group of businessmen who are behaving recklessly, while "crazy boys" may be more appropriate for describing a group of rowdy teenagers.