facebug
A facebug is a person who won't stop bugging you on Facebook like you’re their personal slave. They comment on everything you post, send you messages when you’re trying to sleep, and won’t stop until you scream into a pillow.
"Hey, did you eat lunch?", 3 times in one hour
They sent me a message at 2 AM: "I miss you."
They tagged me in a photo of their cat wearing a hat, twice.