* Not a teacher
Can you post the context? It doesn't mean much without it.
Dear SirGod.
Thank you for your reply.
It's from an American drama.
A man put some kind of special effect on the video and said the line below smiling.
"No computer-generated cheat.
That's something the audience can really invest in.
Oh, you see that?
Boss move, ain't it?"
Can you tell what he means?
I would agree with the others to an extent. In most computer games, the final villain or challenge to be defeated (at the end of a game or the end of a level, and usually more difficult to beat than other "baddies" so far) is known as the "boss villain" or simply the "boss"; thus a "boss move" is usually used to refer to a clever and difficult to achieve move or action on the player's behalf, perhaps one required to beat the boss, which I suppose the right kind of person would consider a "cool" move.
http://en.wikipedia.org/wiki/Boss_(video_gaming)
I can't be sure. It seems possible that the first two lines are self-congratulation about what he's done, and the next two are an imagined conversation between two admiring users - with 'boss', as you suggest, meaning something like cool'.
b