Facebook Preacher 

The act of posting ones religious beliefs on Facebook on a daily basis when in reality the don't follow the advice they are giving to everyone else. Usually ends up on someones blocked list, or unfriended.

Friend 1- Dude why's your mom always talking about the bible on Facebook? Does she not know that no one cares?
Friend 2- Idk shes such a Facebook Preacher because all she really does is sit around and smoke all day and watch Jeopardy and Wheel of Fortune.
Friend1- Oh OK.

Facebook Preacher by Draketehrobber October 6, 2011

Facebook Preacher 

1. A Person who is a preacher but would rather spend all their time on Facebook bashing other Preachers instead of doing what they were called to do.

That person is such a Facebook Preacher, I never see them outside of the Church except on Sundays. They stay on Facebook.

Facebook Preacher by Bishop2014 December 3, 2014