verb/vɑ̃.dʁə dy ʁɛv/
to sell hope, to peddle snake oil, to be a purveyor of dreams; to be the stuff dreams are made of, to sound absolutely great; to be too much (to be someone who is absurdly funny or ridiculous by one's behaviour)
“Near-synonym: promettre monts et merveilles”
Synonyms: promettre monts et merveilles, faire rêver
Literally, “to sell dream(s).”