Top Definition
The cop's version of going on strike. Since they can't legally strike they all call in sick.
When the city threatened to reduce pensions, the NYPD came down with a bad case of the blue flu.
by Tragic Story December 22, 2004
1 more definition
When the female gender (or male) loves a man in uniform, particularly a police officer.
"Omg Jackie, I just came back from this guys house and he's a cop" Jackie says "so you have the blue flu?"
by Thetwofeath March 29, 2015

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