Going postal, in American English slang, means becoming extremely and uncontrollably angry, often to the point of violence, and usually in a post office or other workplace environment.
The expression derives from a series of incidents from 1983 onward in which United States Postal Service (USPS) workers shot and killed managers, fellow workers, and members of the police or general public in acts of mass murder. Between 1986 and 1997, more than forty people were gunned down by spree killers in at least twenty incidents of workplace rage.
Famous quotes containing the word postal:
“This is the Night Mail crossing the Border,
Bringing the cheque and the postal order,
Letters for the rich, letters for the poor,
The shop at the corner, the girl next door.”
—W.H. (Wystan Hugh)