What is Facenook?
1.
Acquiring a sexual partner on the online social community known as facebook
I coped some of that facenook thanks to Fitt's profile.
See
2.
To aggressively stalk; i.e., to Facebook someone so thoroughly that one has virtually explored all possible nooks and crannies of the stalkee's Facebook personality.
"Dude, you should probably stop Facenooking her and just give her a damn call already."
See