Recent Examples on the WebHolt gets to use some profanity that NBC won’t air before realizing something: The blue flu didn’t raise the crime rate. Brian Tallerico, Vulture, 19 Aug. 2021
Word History
Etymology
from the color of a police uniform
First Known Use
1967, in the meaning defined above
Legal Definition
blue flu
noun
: an organized absence from work by police officers on the pretext of sickness that is staged for the purpose of protest