it’s a french expression which is used to define someone who gains mote than 10 00€ per monts originally, but it’s more common to use it to define someone who acts a certain way that shows that they got money or to describe a person who acts like they’re rich.
-J’me suis acheté la nouvelle paire de Jordan aujourd’hui.
-Cool, combien ça a couté ?
-425€
-Ah ouais t’es un plus de dix toi !