Mildly derogatory. A new hire who is raring to go and to "make a difference" in his new job. Usually looked at with disdain or amusement by long-time co-workers. Phrase is often used among law enforcement personnel, but also used in workplace.
"John just mopped the entire men's room and then replaced the paper towels, and then told the chief about it."

"Yeah. That's not even part of his job. He's a real blue flamer."
by JamesOfGreatLength June 22, 2021
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Igniting a fart, creating an eerie blue flame
In the calm of night, counsellor Dan capped his spooky tale to the cub scouts with a blue flamer.
by Soyrelle July 14, 2005
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