Top Definition
To refrain from going on facebook for a certain period of time. This often comes after the realization that too much time has been wasted on facebook resulting in real life problems. In the even of a relapse, an individual is said to pull a triple F (see Failed Facebook Fast).
John was spending all his time on facebook instead of working. He had to go facebook fasting for a few days to catch up on his work.
by SAphoto November 25, 2009

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