Mimi is a colloquial French term, short for mignon or mignonne, meaning "cute" or "adorable." It's an endearing and informal way to describe someone.
In Shay's song, she uses "t'es mimi" (you're cute) in a somewhat dismissive way. While it acknowledges someone's attractiveness, it's often followed by a rejection, implying that being merely "cute" isn't enough to impress her or keep her interest. This gives the word a playful yet assertive edge in the context of the lyrics.
"T Mimi" is Shay's confident, playful flex track. She opens by brushing off a guy who talks a big game but can't keep up, then spends the rest of the song celebrating her own success: designer clothes, new royalty checks, a new Mercedes, and more haters than she can be bothered to count.
The title comes from the recurring line "T'es mimi" ("you're cute") — her way of putting a would-be love interest in his place. He's caught feelings, but she's not here for it; she's seen his type before and there's nobody quite like her.
Underneath the bragging is a simple message: she's earned everything she has, she doesn't need anyone else's approval, and she's not slowing down for anyone who can't keep pace.