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Someone who commonly whines, complains, or looks at the bad side of things.
2nd grade teacher: "All right kids, today we're going to learn an important lesson: how to pack your rock into your crack pipe."
Johnny: "But Mrs. Stoner, my mommy told me drugs are bad."
Teacher: "Johnny, stop being such a negative nancy. You'll never get anywhere in life with that attitude."
Johnny: "But, my mommy said..."
Teacher: "Johnny, please shut the fuck up or I'll send you to time out and brutally murder your family."
by Nick D May 02, 2005
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A nickname given to a guy or a girl who always has a negative spin on things. Always brings the mood down with the doom and gloom analogies.
Jack: Way to go Billy...a grand slam!
Tom: God, it's about time he only struck out the last four at bats.
Jack: Just shush and quit being such a Negative Nancy and be thankful it wasn't a fifth strikeout, but it was a grand slam.

negative bad outlook
by TheBigCanucklehead March 27, 2015
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Someone who is constantly a downer and has a negative influence on others.
Tae Yoo is a negative nancy with his PMS'ing tendacies. He sometimes needs to be alone during his 'special woman' times. This happens at least once a month.
by CM01 July 31, 2007
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a negative person always ruining things
sailor: Sak, your being such a negative nancy! why cant we swim or tip?
Sak: i have the authority, shut up
by cascadineddy August 16, 2007
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