AstroTurf

1. an artificial grass surface used for sports fields.
2. simulated or artificially created public support for something, generated by an orchestrated marketing or public relations campaign.

   an Astroturf movement designed to trample any opposition

1. cover (a sports field or other area) with a layer of Astroturf.

   the garden has been astroturfed for ease of maintenance

   astroturfed tennis courts

2. disguise (an orchestrated marketing or public relations campaign) in such a way as to present it as having arisen from unsolicited public comments.

   there's a suspicion that he astroturfed the campaign behind the scenes

   they alleged that the petition could have been astroturfed

1960s: from astrodome (sense 1) (where it was first used) + turf; Astroturf (sense 2 of the noun) arose from the idea that such a campaign is an artificial version of a grassroots campaign (see grassroots).