Facebook Creaper
A Facebook Creaper is someone who tags your butt in a group photo and expects you to thank them. They also tag you in pictures where you're clearly not even there.
Caption: 'My butt is in this pic. You’re in it too. It’s a fact.'
Comment: 'I tagged your face in this group picture. You're welcome.'
DM: 'I tagged your leg in that photo. It was a noble cause.'