tinfoil hatter

tinfoil hat +‎ -er

tinfoil hatter (plural tinfoil hatters)

1. (slang, derogatory) One who believes in and/or propagates conspiracy theories.
   • 2005, Margot Roosevelt, "Not in My Water Supply", Time, 17 October 2005:

     The Washington State Dental Association is backing his $300,000 pro-fluoride campaign. Danelle Weaver and her friends, meanwhile, have raised less than $10,000. But they are undaunted. "People think we are tinfoil hatters," says Weaver, "but we're just average families who take the time to research and want what's best for our children."

   • 2012, Roger Bouwman, 99 Days, Lulu.com (2012), →ISBN, page 11:

     We then tell the public and get laughed at and called crazy tinfoil hatters and then it happens just as we said it would.

   • 2014, Alaya Dawn Johnson, Love Is the Drug, Arthur A. Levine Books (2014), →ISBN, unnumbered page:

     She doesn't know whom to believe, but she agrees with the tinfoil hatters about one thing: Something is weird here.

   • For more examples of usage of this term, see Citations:tinfoil hatter.