copain comme cochon

== French == === Pronunciation === IPA(key): /kɔ.pɛ̃ kɔm kɔ.ʃɔ̃/ === Adjective === copain comme cochon (feminine copine comme cochonne, masculine plural copains comme cochons, feminine plural copines comme cochonnes) (simile, colloquial, chiefly in the plural) very close friends; thick as thieves