Blue Bird is
1- slang for cop, police officer, security guard, etc.
2- a blue bird is a police helicopter.
3- Sunny skies on the slopes, ideal for any boarder.
4- a term in Florida prison systems, referring to the bus that transers inmates from place to place.
5- it is the painful feeling when a good tweet is halfway done and suddenly all inspiration is lost.

http://www.urbandictionary.com/define.php?term=bluebird