A fedposter is an imageboard or forum poster who is most likely a federal agent. Originating from 4chan's /pol/ board and associated communities, the term refers to a poster who openly calls for violence against others or encourages one to break the law in some manner.

The fed part of fedposting comes from the fact that these posts are either made by federal agents hoping to entrap someone into saying the same thing and getting visited by the feds for it, or by naive people saying the same things and ending up with visits from the feds.
Chances are if somebody is talking about blowing up a religious building on /pol/, they're either a fedposter or they're getting a visit from the feds real soon.
by Mjfan13298 May 30, 2019
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