pour/throw cold water on
US /pɔr/θroʊ koʊld ˈwɔtər ɑn/
UK /pɔr/θroʊ koʊld ˈwɔtər ɑn/

1.
jeter un froid sur, décourager
to say or do something that discourages someone or makes them feel less enthusiastic about something
:
•
She was excited about her new business idea, but her parents poured cold water on it.
Elle était enthousiaste à propos de son idée de nouvelle entreprise, mais ses parents ont jeté un froid sur cela.
•
Don't throw cold water on his plans; he's really trying hard.
Ne jette pas un froid sur ses projets; il essaie vraiment fort.