Its strength has been eroded by overuse, and it can now be used to respond to any mildly pleasing news. Somehow the extreme unctuousness and insincerity of this tends to go unrecognized or is an occasion for the self-gratifying feeling that one is being tolerant.
Smith-"Everyone has the day off tomorrow!"
Waiter: "Are you ready to order?"
Customer: "err, yes..."
Alternatively, in regards to Gordon Shappey:
Arthur: He's ah-- he's ahh-- he's alright.
Martin: Oh god he must be aweful!
A. United States: Intelligent, particularly in innovative or unique ways. Often used sarcastically for shining examples of outstanding and innovative stupidity.
B. Britain: Of very high quality in any way, in a manner or circumstance where that quality stands out.
C. Canada, Australia, and New Zealand: Predominantly used in the sarcastic mode of the US sense.
US(sarcastic): Rick Santorum is brilliant to answer questions about contraception.
UK: The Doctor frequently says 'You're brilliant!" to people who have no idea why.
Canada: With P.M. Harper's party leading an unstable minority government, his strategy of looking to George Bush as a role model is brilliant.