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2.
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
 
1.
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 03, 2009