Slang for: Police officer. Police in the USA usually wear a distinctive dark blue uniform.
The blue dudes were scoping tight yesterday.
by Robert Anderson April 14, 2006
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Street Slang used by many to replace the word Police.

Originated in 2005 in Bronx, New York
The name was given after the Colors on Police car Sirens.
"Hide the weed, It's The Red & Blue Dudes!"
by XqUiSiT3 October 28, 2005
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Somebody who’s manner is displeasing or inconsiderate to others.

Originated in South Auckland
Oh stink, that blues dude isn’t giving me any of his Fanta
by Gggyyyuuuqqq May 21, 2019
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