Going Postal

Going postal is an American English slang phrase referring to becoming extremely and uncontrollably angry, often to the point of violence, and usually in a workplace environment. The expression derives from a series of incidents from 1986 onward in which United States Postal Service (USPS) workers shot and killed managers, fellow workers, police officers and members of the general public in acts of mass murder. Between 1970 and 1997, more than 40 people were killed by then-current or former employees... meer