snobatarian 

Someone who eats vegetarian except when he or she goes out for a really fancy meal

"Tim ate vegetarian there and loved it. Oh, I lied. He ate meat."
"He did?!"
"Snobatarian."

snobatarian by pseudonymy September 18, 2012

Sabbatarian 

Someone who observes Saturday, the seventh day of the week (look at your calendar), as a day of rest.

EXODUS 20:8-11 says that we should be Sabbatarians.

Sabbatarian by 3in1 July 28, 2006