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A person who comments on someone's Facebook wall on their birthday and has no clue who it is. They just want to feel important.
Happy Birthday! I hope you have a good day! (from a guy who follows you because he thinks you’re his cousin's ex's friend's mom)
Wishing you a day full of joy! (from someone who once commented on your post about your cat)
You look happy! (from the guy who used to comment on your status every Monday for a year)