The simplified description is ‘Fake News’.
It’s better to understand the more complete picture.
From http://beaconofmasoniclight.blogspot.com/2007/09/what-is-egregore.html
…The egregore is a psychic entity, existing between the material and the spiritual, in contact with both. It is the creation of the psychic will of the members of a group…
…The egregore serves as a conduit, a nexus, to connect the group that created/invoked it to the spiritual…