QAnon
Wiki, Facts

The theory began with an October 2017 post on the anonymous imageboard 4chan by someone using the name Q, who was presumably an American individual initially, but probably later became a group of people, claiming to have access to classified information involving the Trump administration and its opponents in the United States

Q has accused many liberal Hollywood actors, Democratic politicians, and high-ranking officials of being members of an international child trafficking ring

Q also claimed that Donald Trump feigned collusion with Russians to enlist Robert Mueller to join him in exposing the ring and preventing a coup d'état by Barack Obama, Hillary Clinton, and George Soros

"Q" is a reference to the Q clearance used by the Department of Energy

QAnon believers commonly tag their social media posts with the hashtag #WWG1WGA, signifying the motto "Where We Go One, We Go All"

The conspiracy theory, mainly disseminated by supporters of President Trump under the names The Storm and The Great Awakening - QAnon's precepts and vocabulary are closely related to the religious concepts of millenarianism and apocalypticism, leading it to be sometimes construed as an emerging religious movement