Fecesbook

Nickname for the social networking website Facebook, and the namesake company that operates it.
The nickname reveals the low opinion of a sizeable portion of the public with regard to Facebook.
Criticism ranges from privacy concerns, to crap applications indigestion, to health issues resulting from the act of 'poking' other people.

The act of using the social-networking site Facebook while in the bathroom, usually from a smartphone or other mobile device.