from Wiktionary, Creative Commons Attribution/Share-Alike License.
- verb intransitive, informal To behave in a
hysterical, angryor irrationalmanner.
from Wiktionary, Creative Commons Attribution/Share-Alike License
go (in the sense "become") + postal; from a rash of incidents, mostly gun violence, perpetrated by disgruntled U.S. Postal Service workers on co-workers in the United States, beginning in the 1980s (see quotations)
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