The phrase 'Living Rent Free' became a viral internet staple around 2018, primarily gaining traction on Twitter and in sports communities. It describes a situation where someone—typically an opponent, a critic, or a bad memory—occupies a person's thoughts to the point of obsession, usually without the other party even trying. The term is the ultimate dismissive comeback, suggesting that the person being criticized is actually the one in control because they are dominating the other person's mental space. Today, it is used across all social platforms to poke fun at everything from celebrity feuds to embarrassing personal memories that simply won't go away.