wet blanket

US /wɛt ˈblæŋkɪt/
UK /wɛt ˈblæŋkɪt/
"wet blanket" picture
1.

зануда, мрачный человек

a person who spoils other people's fun by being negative and unenthusiastic

:
Don't invite John to the party; he's such a wet blanket.
Не приглашай Джона на вечеринку; он такой зануда.
She's always being a wet blanket, complaining about everything.
Она всегда зануда, жалуется на всё.