originally coined from a series of real life shootings in the postal service, it now usually means that someone is about to go nuts or off the deep end. the reason for going postal is usually trivial. also, means person on psychiatric meds that is off their pills.
after finding her computer'swallpaper had been changed again, Jane went postal on her fellow workers.
By Amandi
Going Postal
When someone gets uncontrollably angry, often to a point of violence, usually in a workplace
After finding out Mark had another hour added to his 4 hour maildelivery shift, He brought a gun into work the next day and was reportedly going postal on fellow workers and customers
By Lyssa
Going Postal
Basicly, "going postal" is pulling a uzi, assault rifle or most any other firearm out from under your jacket and going nuts. That is, wasting anyone and anything you see, and then probably yourself. A bit like going apeshit.
Jim had left another burning paper bag of crap on John'sdoorstep, so John retaliated by going postal on his ass.
By Jean
Going Postal
When somebody gets really pissed and acts out in violence. They might push someone's head through a wall.
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.
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 testerMichael 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.
By Katherine
Go Postal
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)