Top Definition
The act of using the social-networking site Facebook while in the bathroom, usually from a smartphone or other mobile device.
(on facebook chat)

Guy 1: Hey
Guy 2: 'sup
Guy 1: Watcha doin?
Guy 2: I'm on the crapper fecesbooking, hbu?
Guy 1: Same dude, same.
by d2acc1 February 12, 2011

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