put a damper on (something)

put a damper on (something)

To discourage, inhibit, or deter something; to make something less enjoyable, pleasant, or fun; to have a subduing or deadening effect on something. The foul weather really put a damper on our picnic yesterday. Without question, this tax scandal has put a damper on the senator's likelihood of being re-elected. The construction happening near our building has really put a damper on sales this month.
See also: damper, on, put