When two or more people have a mindless heated argument on Facebook, whether it's through comments on profile pictures, profile walls, etc.
Person #1: You hear about the fight after school today?
Person #2: No, what happened?
Person #1: Did you see the facebeef on Samantha's profile picture? The one with her and her boyfriend John.
Person #2: Hahaha, oh yeah. Sam's ex left a comment asking if he was enjoying his sloppy seconds. Then John commented back and said he was gonna kick his ass.
* Facebeek (to post things on Facebook, to use Facebook)
* Re-Facebeeking (the activity of performing Re-Facebeek action)
Term used to denote re-posting another person's Facebook post. This is intended to generically include anything that can be re-shared (status updates, posted links, photos, etc.) Its origin is in Tweet/Re-Tweeting for Twitter.
Freds status: Life is a gamble, and im holdin the poker chips.
Rob comments: Fuck ya poker chips
Fred comments: Who the fuck are you dick
Dave comments: lol Facebeef?