vendre du rêve

French edit

Literally, “to sell dream(s).”

(derogatory) to sell hope, to peddle snake oil, to be a purveyor of dreams
Near-synonym: promettre monts et merveilles
(informal) to be the stuff dreams are made of, to sound absolutely great
Synonym: faire rêver

Ça vend du rêve ! ― (please add an English translation of this usage example)
(slang) to be too much (to be someone who is absurdly funny or ridiculous by one's behaviour)
Tu vends du rêve ! ― You're too much!