To make oneself appear badass on the internet, particularly through the use of an internet-trenchcoat.
One who trenchcoats.
To have the quality of a trenchcoater.
Man, that guy on *random RPG* is always trenchcoating up the place. He really needs to get a new description.
"A man in a tattered trenchcoat with the lapels raised to cover his face. All you can see are the lit coals of his cigarette. A shotgun is attached to his back. Everyone knows not to mess with this guy."