When an individual does not receive any comments or notifications on their
facebook for a period of
time after their
birthday because everyone figures they've had enough wallposts and attention for awhile and because nobody has anything else to say that is considered relevant.
Friend posts on
wall: Hey man how you've been?
Friend responds: Good man, but I know you're just commenting on my
wall to get out of that post bday facebook drought you're in because you had a successful
birthday wallpost count and no one wants to spoil you with more notifications!