verb

ne craindre ni Dieu ni diable

/nə kʁɛ̃.dʁə ni djø ni djabl/

verb/nə kʁɛ̃.dʁə ni djø ni djabl/

to fear neither Heaven nor Hell, to be unscrupulous, to be lawless, to have no respect for any authority

Literally, “to fear neither God nor devil”.