Is Guys A Slang Word?

According to what she shared with Business Insider, it is not conventional etiquette to refer to everyone as males. Avoid using this word since it is considered to be slang. According to Diane Gottsman, a nationally recognised authority on proper manners, the phrase "guys" denotes familiarity, camaraderie, and even fondness. She also makes the point that the statement is almost never intended to be insulting.