adjective

propre comme un sou neuf

/pʁɔ.pʁə kɔ.m‿œ̃ su nœf/

adjective/pʁɔ.pʁə kɔ.m‿œ̃ su nœf/

Very clean; squeaky clean; clean as a whistle

Literally, “clean as a brand new penny”.