a blanket dampened with water so as to extinguish a fire.
2.
a person or thing that dampens enthusiasm or enjoyment:
Nobody asked him to join the group because he's such a wet blanket.
Origin
1655-65
wet-blanket
[wet-blang-kit] /ˈwɛtˈblæŋ kɪt/
verb (used with object)
1.
to extinguish (a fire) with a wet blanket.
2.
to dampen the enthusiasm or enjoyment of (a person, group, etc.).
Origin
1865-70
British Dictionary definitions for wet blanket
wet blanket
noun
1.
(informal) a person whose low spirits or lack of enthusiasm have a depressing effect on others
wet blanket in Culture
wet blanket definition
Someone who dampens enthusiasm: “We were all having a good time until Harold walked in and started acting like a wet blanket.”
Slang definitions & phrases for wet blanket
wet blanket
noun phrase
A person who dampens and smothers all enthusiasm; a person who prevents fun; a pessimist; killjoy, party pooper (1879+)
Idioms and Phrases with wet blanket
wet blanket
A person who discourages enjoyment or enthusiasm, as in Don't be such a wet blanket—the carnival will be fun! This expression alludes to smothering a fire with a wet blanket. [ Early 1800s ]