A metaphorical and rather elusive phrase which is used to describe having obsessive thoughts over another person or group (usually followed by 'in my head').

The elusive part, imo, comes from the phrase's seeming implication that someone wants to live inside your head, as in they wanted you to think about them, when it's often the opposite case (i.e. you obsess about them and they don't know/it wasn't their plan).

So when I say "Jake is living rent-free in Sally's mind", it doesn't imply that Jake has successfully enamoured Sally with his charm. What it really means is that Jake is unaware that he is the object of obsession in Sally's mind. But since Jake is unaware, his pov becomes nullified and therefore defaults to Sally's pov ("Sally is obsessed with Jake"). This phrase ๐˜ค๐˜ข๐˜ฏ be used to imply that Jake had successfully infatuated Sally, however most people tend to use it for its inverse meaning. It can also be used for someone beyond just your crush, such as someone who hates you.

Just shining some light on the hidden logic behind this phrase, which some people might find confusing (e.g. me).
๐—–๐—ผ๐—บ๐—บ๐—ผ๐—ป ๐—˜๐˜…๐—ฎ๐—บ๐—ฝ๐—น๐—ฒ:
Maddy: Who are you staring at?
Ophelia: No one...
Maddy: Damien's living rent free in your head, I can tell.

๐—ข๐˜๐—ต๐—ฒ๐—ฟ ๐—˜๐˜…๐—ฎ๐—บ๐—ฝ๐—น๐—ฒ:
Rust Teammate 1: Hey I was away for a few days, fill me in.
Rust Teammate 2: We just pulled off a massive raid on one of the most heavily fortified bases, and we destroyed it to smithereens!

Rust Teammate 1: Damn! nice!! I guess we must be living rent-free in those team's heads now, hahaha.
by Mary Mary Quite The Contrarian November 27, 2022
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by xPytu's chat May 22, 2022
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