From Wiktionary, the free dictionary
- IPA(key): /ɛ.tʁə ply ka.tɔ.lik kə l(ə) pap/ ~ /e.tʁə ply ka.tɔ.lik kə l(ə) pap/
être plus catholique que le pape
- to be more Catholic than the Pope, to go overboard, to overdo it; to be an extremist, to have extreme views
- Synonym: faire de l’excès de zèle