A negative person who tends to ruin other people's good times.
Don't let Joseph come on the Vegas trip, he's only going to be a wet blanket and take the fun out of everything.
by FHOIA August 24, 2005
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Someone who is over-emotional. One who dwells on their negativity.
"Ah man that stupid emo guy always whines about stuff, what a wet blanket!"
by Tzeentch February 16, 2005
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Someone or something that could have utility but chooses not to.

This is from the idea that a blanket could be a wanted item, but is no longer wanted when wet.
Mike is a really fun guy but ever since he started dating Sarah he became a wet blanket.
by the Broadcaster October 15, 2008
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that one triplet on My Super Sweet Sixteen they keep referring to
I don't wanna be a wet blanket anymore; that's why I'm dressing like a slut.
by Ashlarr December 31, 2005
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A blanket that is wet.
Man, I spilled water all over my blanket. Now I've got a wet blanket!
by meeeboooo September 13, 2010
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After having sex with a girl, you go into the bathroom and wipe the pussy juice off of your dick with a washcloth. When returning to the bedroom, you throw the washcloth on the girl's face. Thus giving her a wet blanket.
My girlfriend kept complaining how warm the room temperature was, so I shut her up by giving her a wet blanket.
by Jihad Muhammed January 21, 2007
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Someone who soaks up cum instead of doing anything fun.
james didnt want to go the movies last night so he was being a wet blanket.
by destroyer_3rd May 16, 2009
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