Killjoy= party-pooper = Wet blanket Means: a person who ruins the fun; someone who ruins a party because of dullness or by leaving early. Examples: Don’t invite Martha. She’s such a party-pooper. Oh, Martin! Why do you have to be such a wet blanket? Don’t be such a killjoy! 795 views𝒏𝒂𝒔𝒉𝒂𝒕, 19:47