adjective/ʁiʃ kɔm œ̃ aʁ.ʒɑ̃.tɛ̃/
rich as Croesus (extremely rich)
Synonyms: riche comme Crésus
Antonyms: pauvre comme Job
Literally, “rich like an Argentine”. Derived from the extraordinary wealth of the Argentine landowning aristocracy in the early 20th century.