going postal 

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's wallpaper had been changed again, Jane went postal on her fellow workers.

going postal by Foozi100 August 17, 2005

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 mail delivery shift, He brought a gun into work the next day and was reportedly going postal on fellow workers and customers

going postal by NickBaggss March 4, 2016

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's doorstep, so John retaliated by going postal on his ass.

going postal by Johnny The Homicidal Maniac August 19, 2004

Going Postal 

verb. to suddenly transform into a mailbox

Our sex life went to hell when my husband started going postal.

Going Postal by Malebox June 6, 2022

going postal 

When somebody gets really pissed and acts out in violence. They might push someone's head through a wall.

Addison is going postal and she is about to throw a punch at Timmy.

going postal by mcnuggetdestroyer January 3, 2018

Going Postal 

Someone who can't stop posting on Facebook.

Dude, I've posted like 5 times today on Facebook, I think I'm going Postal.

Going Postal by bunnylips November 3, 2011

going postal 

When you can't afford buying something you really want, and pitch a fit.

Alicia's broke, so she's going postal again....

going postal by Emmi-chan June 25, 2005