live rent-free in someone's head
constantly occupying someone's thoughts, often annoyingly · can't stop thinking about something/someone
What's the situation?
This expression is perfect for those moments when a catchy tune, a funny meme, or even a particular person just keeps popping into your head, whether you want it to or not! 🧠💸 It's like they've taken up permanent residence in your brain without paying a dime.