Facebook in-law

The familial or friend relationship that occurs when your friends and family add your significant other, whom they don't really know, to their Facebook friends list just because you two are together.

My boyfriend is now my cousin's Facebook in-law since she added him to her Facebook friends list!

Facebook in-law by Jody M May 15, 2010

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Facebook in-law • SIGN IN (づ ◕‿‿◕ )づ Please sign in to vote and post new definitions Sign in with Facebook Sign in with Gmail • Punched in the Facebook • all up in my facebook • In my Facebook • rubbing it in your facebook • "in your face"book • In-Your-Face-book Friend • facebookin' • facebookin faggot