... well ... if you want complete accuracy, below is the link to the FAA ATC communication bible. It's only 602 pages ...

http://www.faa.gov/documentLibrary/media/Order/7110.65T.pdf

I'm strict with my flying students on teaching/using correct terminology. Anything less is a waste of valuable radio air time and can lead to misunderstandings. Drives me crazy having to listen to the occasional Chuck Yeager wannabe trying to be cool but is just an incident waiting to happen.