facebook cheater
A Facebook cheater is someone who's dating someone else but still messages, comments, and tags another person on Facebook like they're trying to get them to sleep with them. They're so obvious, but the person being cheated on never catches on.
Hey, I saw your post. You're hot. Let's go out sometime.
I just became friends with your friend. She's amazing.
Why are you always tagging me in your photos? You're making me blush.