A Non-Religious person who celebrates holidays that they have no right to. For instance, if you denounced Christianity 15 years ago, yet you still celebrate Christmas and Easter, you are a Holiday Whore. Most Atheists are Holiday Whores.
"Dude, what are you doing shopping for Christmas? I thought you were Athiest?"
"Yea, but I still celebrate it."
"Dunno, its fun."
"Dude, you're a total Holiday Whore!"