Mansplaining isn't just the act of explaining while male, of course; many men manage to explain things every day without in the least insulting their listeners... Mansplaining is when a dude tells you, a woman, how to do something you already know how to do, or how you are wrong about something you are actually right about, or miscellaneous and inaccurate "facts" about something you know a hell of a lot more about than he does.