A moment in life or on webcam that something funny or interesting happens to a friend or lover that you feel all your facebook friends NEED to know. (ie. embarrassing moment, accident, personal matters) That you post on your wall on Facebook
I made a faceplant last week and my bestfriend decided it was a facebook moment. Now people make fun of me for it!
My girlfriend did a booby dance last night. It was a total Facebook moment!