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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To deactivate your facebook account and not activate it for as long as you can until you give in.
Jennifer: Hey did Susan get rid of you also on facebook?
Tim: No, she just went on a Facebook Fast.
by RoseyPosey67 May 3, 2009
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Taking a break from Facebook when you realize you are spending way too much time there.
I had to take a Facebook fast because I was getting nothing done at work.
by PalmSprings09 August 13, 2010
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One is said to have pulled a Failed Facebook Fast, or a tripple F, when the action of refraining from logging on to facebook (facebook fasting) has failed.
Susan was going to be facebook fasting for a week but she pulled a tripple F after a couple of days.

John said he was never going back on facebook, but he was back 1 hour later. Major failed facebook fast.
by SAphoto November 25, 2009
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