✨ LIVE RENT FREE ✨ According to my recent poll, only 24% of English learners know what this British slang expression means. It means to constantly think about something. Here are some examples; "That annoying Tiktok song is living rent free in my head. It's driving me crazy!" "My ex has been living rent free in my head for months now" "The moment when Wales lost the final lives rent free in my head."