Definition
The petty post-breakup scramble to comment and like a mutual friend's posts before your ex does, thereby 'claiming' them to your side—basically digital team selection at its most immature and passive-aggressive.
Example Usage
After my girlfriend and I broke up, I was marking Facebook territory on all our mutual friends' profile pictures.
Source: Urban Dictionary (https://www.urbandictionary.com/define.php?term=Marking%20Facebook%20Territory&defid=6126412)
Related Terms
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See “Marking Facebook Territory” in Corporate Speak, Gen-Z Slang, Pirate Speak, and more.
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