n. an imaginary disease afflicting police officers who call in sick during a work stoppage or slowdown. (Journalistic. Occurs where strikes are illegal.) : Another epidemic of the blue flu struck the city's police officers early today.
n. a hangover. : He was out late last night and has the blue flu.
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition. Copyright 2007. Published by McGraw Hill.
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