Top Definition
To lash out violently and at random, often in a blind rage. Term taken from the 1990's incidents of workplace violence involving US Postal System workers.
I was so angry at work with the new workload, I was afraid I'd go postal.
بواسطة Unidyne مارس/آذَار 11, 2005
To exact calculated revenge on co-workers or schoolmates, usually with a firearm, after being fired or expelled or just feeling extremely hard-done-by.

Software tester Michael McDermott shot and killed seven co-workers in 2000 after having his pay docked to cover back taxes.
A disgruntled former worker went postal today leaving seven dead, including two accountants he had accused of being 'Nazis' the day before.
بواسطة bee مارس/آذَار 22, 2005
to succumb to fatigue and tension, to be become violently angry(from a series of incidents from the mid 80s to the 90s where various postal workers went on shooting rampages)
I will not let him go postal in plain sight.
بواسطة The Return of Light Joker يوليو/تمُّوز 10, 2008
To loose touch with someone for a long time. Not talk to someone in a while.
You go postal on me all the time and I only hear from you every 3 months.
بواسطة Boopboop يونيو/حَزيران 3, 2007
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