tin hat

plural tin hats · alternative tinhat

1. historicalslanggovernmentThe steel helmet worn by soldiers during World War I.First known use 1915

   They could live on jerked goat, the strong black coffee they called 'boiler compound,' and hash cooked in a tin hat.

   2007, Winston Groom, 1942: The Year That Tried Men's Souls

   Synonyms: trench derby

2. A tinfoil hat.

   I don’t look like a conspiracy theorist. No tin hat, right?

   2018, Alex Oates, “Rules for Being a Man”, in Silk Road (How to Buy Drugs Online) and Rules for Being a Man, Bloomsbury, page 38

   2 more examples

   The New World Order is a term that has often been laughed at, ridiculed and considered as paranoia by tin hat wearing conspiracy theorists in recent history.

   2011, Andrew Curtiss, 1984 Redux: Say Hello to Big Brother, page 491

   Meanwhile we're all being led like sheep to the slaughter while being portrayed by the industry that would commit genocide as a fringe group of misguided, uninformed, conspiracy theorist, tin hat lunatics that also believe in alien abductions.

   2011, Carol Ann Lindsay, The Planet Of Comet Sense, page 102