put a damper on
US /pʊt ə ˈdæmpər ɑn/
UK /pʊt ə ˈdæmpər ɑn/

1.
estragar, colocar um freio em
to have a negative effect on something, making it less enjoyable or successful
:
•
The bad weather really put a damper on our picnic plans.
O mau tempo realmente estragou nossos planos de piquenique.
•
His negative attitude always puts a damper on team morale.
A atitude negativa dele sempre estraga o moral da equipe.