going postal
jim had left another burning paper bag of crap on john's doorstep, so john retaliated by going postal on his ass
"basicly, "going postal" is pulling a uzi, assault rifle or most any other firearm out from under your jacket and going nuts
"jim had left another burning paper bag of crap on john's doorstep, so john retaliated by going postal on his ass" What is the definition of "going postal"?