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Logging onto Facebook to see what's been said and posted without posting anything yourself, commenting, or otherwise participating.
Person A: I was on Facebook for about an hour.

Person B: Didn't see you.

Person A: Didn't say anything.

Person B: Oh, Facelook.
by in.high.speed August 18, 2009
Looking at someone's profile on the social networking site, facebook, often specifically someone who you haven't met.
I had this blind date, and I was worried she would be a freak, so I facelooked her.
by icy118 August 21, 2007
used to define any expression on someones face.
Johnny: Did you see the facelook that girl gave you
Anthony: Yea, she was all sorts of pissed
by DJ Or Derb April 01, 2011