Usually a male, of middle to upper class society known to be unsympathetic and condecending by nature. A justified self righteous attitude. An individual most love to hate, but feel strangely drawn toward.
MB's are often but not always recognized for thier taste for and indulge in luxurys such as beautiful women, cars, cigars, jewlery etc.
Golfer:You Magnificent Bastard! You scored a hole in one. Thats amazing!
MB: I know. Too bad you'll never know what it's like.