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Meaning of popoff

pop•off

Pronunciation: (pop'ôf", -of"), [key]
— Slang. Slang.
—n.
  1. a person who generally speaks loudly or irately; indiscreet arguer or complainer.
—adj.
  1. pertaining to or characteristic of such a person: His popoff remarks cost him many friends.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.