Mansplaining is when a man explains something to a woman in a way that assumes she doesn’t understand it, even if she already does. It can happen when the man thinks he knows more because of his gender, and it often comes across as condescending or patronizing. For example, if a woman is talking about cars and a man interrupts to explain how an engine works, assuming she doesn’t already know. Mansplaining can make women feel belittled or frustrated because it disregards their knowledge and expertise.