• When a group of government agents (i.e. FBI, DEA, [ATF], etc.) are enacting a [search warrant] on a premises. So named because of the large amount of agents that wear trenchcoats as part of their attire. Term used more often in colder regions of the country. Can also apply to [municipal] law enforcement detectives as well.


    Trenchcoat convention meaning & definition 1 of Trenchcoat convention.

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