put a damper on something

put a damper on something

or

put a dampener on something

BRITISH
COMMON If someone or something puts a damper on a situation, they stop it being as successful or as enjoyable as it could be. Unseasonably cool weather has put a damper on many plans for the day. Rooney's injury put a dampener on a fine victory for his team on Saturday. Note: This expression may refer to either of two meanings of `damper'. In a piano, a damper is a device which presses the strings and stops their sound. In a chimney, a damper is a movable metal plate which controls the amount of air getting to the fire, and so controls how fiercely the fire burns.
See also: damper, on, put, something

put a damper on something

tv. to reduce the intensity of something, such as a problem. The death of the chief put a damper on the ceremony.
See also: damper, on, put, something