1. Goin’ Postal
If you were alive in the 1990s, you know that the slang expression “going postal” refers to workplace rage that results in gun violence.
Look it up. According to Wikipedia, the expression was first used in a 1993 news article that referred to outbursts of violence at U.S. Postal Service locations.
The shipping company Goin’ Postal was founded in 2002, according to its website, and — let’s say in spite of the name — now boasts hundreds of locations across the United States.