to Facebook instead of sleep even though your eyes are heavy and you will most likely fall asleep with your phone on your chest with the Facebook app open.
L:Why are you posting on fb rather than taking that nap you told me you were taking?
by Misstracid September 05, 2015
The act of Facebooking while sleeping, similar to sleepwalking.
Dude i'm pretty sure I was sleepbooking last night, i liked your status at 4:30 a.m.
by getnrealnwv May 12, 2010