when a facebook friend posts frequently enough that they come up your news feed, but since they come up on your news feed facebook thinks you want to see everything they post, therefore causing a spamming of said friends posts and resulting in involuntary facebook stalking.
person1: Man all I see is this person's post!
person2: Dude, why are you facebook stalking?
person1: It's involuntary facebook stalking, they just post so much!
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