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

1.
koud water over iets heen gooien, ontmoedigen
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.
Ze was enthousiast over haar nieuwe bedrijfsidee, maar haar ouders gooiden er koud water over.
•
Don't throw cold water on his plans; he's really trying hard.
Gooi geen koud water over zijn plannen; hij doet echt zijn best.