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1.
The act of conducting routine Facebook activities while perched on the throne taking a dump, commonly on a mobile device, usually at one's place of work. See also, toiletbooking, duecebooking, and multi-tasking.
I like to do a little Facedumping while I "drop the kids off at the pool" every morning at work. It helps me relax.

Did you notice he always has his iphone with him when he goes into the can, man, you know he's totally Facedumping in there.
by e-boner February 05, 2010
 
2.
The act of checking your facebook status updates while taking a dump. Usually via a mobile device.
Yo, Why did you take do long in the bathroom?

Sorry, I was face dumping and lost track of time.
by HGH-MO July 17, 2009