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1. verb, slang To arrest someone. The police will flag all of us if they catch us drinking—we are underage, you know.
2. verb, slang To fail something. You better study hard, or you'll flag this exam.
3. noun, slang The grade of F on something. You better study hard or you'll get a flag on this exam.
4. noun, slang A bandana worn to show one's gang affiliation. What color flag is that kid wearing?
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
mod. arrested. Sally was flagged, and she called her fixer to come get her out.
See also: flag
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.