Someone who used to have a full Facebook account, but ended up deleting it while still using Facebook Messenger to keep in contact with their friends. Just like a Force Ghost no longer exists but can manifest and communicate- a Facebook Ghost can still chat and participate in group chats, but has no profile to be viewed.
Daniel is a Facebook Ghost and can't be invited to the concert through the Facebook Event page, so the host had to use Messenger to send him the details.

"Hey why can't I check your profile? I didn't get any notifications for your birthday."
"Oh I'm a Facebook Ghost, I deleted my account but I still use messenger to hang out in the group chat. "
by infernlmagician November 15, 2019
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Someone who haunts a persons facebook profile usually in an attempt for the person to notice their interest. see Facebook Stalking.

The ghost will generally check and re-check the haunted page numerous times through out the day in order to be the first to comment or like on any post.
My word Jenny, thats the 5th time John has liked one of my posts and commented on it. He litterally is a Facebook Ghost.
by Memphisx February 11, 2011
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