The mindless surfing facebook completely blazed with no purpose whatsoever. Often accompanied by a gaping mouth, glazed-over eyes, and staying up late into the night accomplishing nothing.
"Dude why did you sleep til 4 in the afternoon?"
"After I came home from smoking with some people last night I ended up facestoning for hours."
A psychological phenomenon present when Facebook users are mysteriously compelled to publicly express themselves at profound, emotional levels whereas they otherwise would not do so in actual life
Smart person: "Hey, have you heard of the 'Leopards Eating People's Faces Party?' They seem pretty cool!"
Neophyte: "I don't know, I'm pretty sure that they want to eat people's faces."
Smart person: "I don't see what you mean."