a person who hasn't the interest or vitality to participate actively in a social party and whose mood, attitude, or personality lessens others' enjoyment; killjoy.
n. the first person to leave a party; someone who ruins a party because of dullness or by leaving early. : Don't invite Martha. She's such a party-pooper.
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition. Copyright 2007. Published by McGraw Hill.
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