If you're a member of the catholic faith you know what a sacrilege is. Wikipedia tells us that a sacrilege is any transgression against what is seen as the virtue of religion. For example, if you willingly take communion with known mortal sins on your soul, you're essentially mocking God. That's what this Chicago restaurant is being accused of with their "Ghost Burger" featuring a communion wafer.

Chicago eatery, Kuma’s Corner is known for its rock-n-roll, heavy metal-themed atmosphere and now the new "Ghost Burger" has got a lot of people talking, and not very favorably.
5 NBC Chicago Reports:

A restaurant official admitted to the Chicago Tribune that some people have expressed concern about the burger.

"The thing with this is, the communion wafer is unconsecrated, so until that happens, it's really just a cracker,"

Well, if you find yourself on the 2900 block of West Belmont Avenue, in Chicago's Avondale neighborhood, stop in to Kuma's and enjoy, unless you're like me and just can't stomach this gimmick.

[NBC Chicago]