péter plus haut que son cul
French
editEtymology
editLiterally, “to fart higher than one's ass”.
Pronunciation
editVerb
edit- (figuratively, vulgar, derogatory) to think one's shit doesn't stink, to think the sun shines out of one's arse, to think one is the shit, to think one is the business, to think one is hot shit (to be full of oneself)