(pronounced boh MOHND)
As you might have guessed, this is a French phrase. Beau means good, and monde means world or society, so put them together and what have you got? The world of fashionable society.
Example: Much to the dismay of her employees, after she married the CEO of a rising tech company, Victoria showed more interest in being a part of the San Francisco beau monde than actually sustaining her successful design practice.