filthy rich
US /ˈfɪl.θi rɪtʃ/
UK /ˈfɪl.θi rɪtʃ/

1.
richissime, blindé de fric
extremely wealthy; having a lot of money
:
•
After selling his company, he became filthy rich overnight.
Après avoir vendu son entreprise, il est devenu richissime du jour au lendemain.
•
You don't have to be filthy rich to be happy.
Tu n'as pas besoin d'être richissime pour être heureux.