tinfoil hat

== English == === Alternative forms === tin foil hat, tin-foil hat === Noun === tinfoil hat (plural tinfoil hats) A piece of headgear made from one or more sheets of tin foil, aluminium foil, or other similar material; especially when worn in the belief that it shields the brain from electromagnetic fields or against mind control or mind reading. Synonym: TFH (metonymic, somewhat derogatory) A conspiracy theorist. ==== Derived terms ==== ==== Translations ====