Fallacious belief that something must be good because you shelled out a lot of money for it.  From the joke about two nouveau-riche types who are standing next to each other at a party wearing identical ties.  One says, "I got this tie for five hundred Euro".  The other says, "That's nothing.  I got mine for at least two thousand Euro."  Not to be confused with the principal that if you buy cheap, you get cheap ... for a yuppie's necktie is never cheap.
Don't spend a hundred grand on a car.  Only those who can't see through the yuppie's necktie fallacy do that.
by Fearman September 16, 2007
Get the yuppie's necktie fallacymug.