“Facebooktarian” refers to someone who pretends to be a vegetarian, creating a fake image of himself in social networks (mainly Facebook), posting pictures of a healthy lifestyle, while in real life he/she actually eats all kinds of unhealthy food (including all types of meats) and doesn't care much about his health.
My friend Jose is a facebooktarian, always posting really veggie pictures on his timeline but actually he eats every kind of meat.
Cryptic posts in facebook that express a vague sentiment but do not provide any details, clearly designed to bait friends to ask follow-upquestions.
A facebook wall post that could be considered facebait would be posts like "Today is the day!" or "Ugh, I am over it..." or "Now I know why I should stay home..." or "Hurt and disappointed..."