a tag or other marker colored red and used to categorize something for a special purpose: Items with a red tag are on sale today.
red-tagPronunciation: (red'tag'), [key]
—v., -tagged, -tag•ging,
to attach a red tag to, as merchandise for special sale.
to identify for a specific purpose; earmark: The inspector red-tagged the restaurant for health violations.
pertaining to or composed of something that has been red-tagged: the store's annual red-tag sale.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.