What makes someone "go postal"? If you're a non-American and are hearing that expression for the first time, to "go postal" is an expression that describes what happens when postal employees go insane, either from the stress of working in the U.S. Postal Service or after being fired from the USPS (and clearly there are other contributing mental health issues), and they bring a gun to work and kill their coworkers and often anyone else who happens to be on the premises... like some innocent civilian who just wanted to buy a book of stamps. This began to happen with some regularity in the 80's and 90's, and after a string of them, someone cleverly coined the phrase and it stuck. Now, "going postal" is often applied to almost any situation where a person goes nuts with a gun. And it's often used with a bit of sarcastic humor when joking about our postal service (as in "You'd better tip your mailman at Christmas or he'll go postal on your ass!") Although we human beings often try to make light of tragedy, probably as a way of coping with painful things that defy common sense and explanation, it's a terrible... Read more →