Have any of you used or heard of this phrase, "A Lexus Liberal"?

I heard a friend use this yesterday whilst referring to another who she believes is guilty of hypocrisy. When asked for the meaning, she said that the other lady in question though very rich and intellectual, hardly does a thing for the societal problems that she talks a lot about and is therefore, deserving of this epithet.

A Lexus Liberal hardly seems appropriate to convey this meaning, but she insists that it is common usage. It was the first time I had heard it, so I am turning it over to all of you. What do you think?