When you "like" or comment on a friend's status, photo, or link on facebook just to increase the likelihood that they will comment on yours, thereby making you look popular.

From the Latin term "quid pro quo," meaning "something for something"
Mark's photo is pretty lame, but I'll "like" it because I'm getting ready to post some of my own. Because of the unwritten rule of face pro quo, he will "like" mine, so I will feel interesting and popular.
by Skinny31 September 6, 2009
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