wet blanket

Don't be such a wet blanket; come and have some fun with us!

He's always the wet blanket at parties, complaining about everything

She tried to liven up the mood, but he was a total wet blanket

I didn't want to be a wet blanket, but the plan seemed too risky

Her constant negativity made her the wet blanket of the group

He was a wet blanket when it came to spontaneous adventures

Nobody wants to invite him because he's always a wet blanket

Let's try to avoid being wet blankets and enjoy the evening

He tried to be optimistic, but his friend was a true wet blanket

She was afraid of being the wet blanket, so she just smiled and agreed