Definition of tinfoil hat in English:

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tinfoil hat

noun

humorous
Used in allusion to the belief that wearing a hat made from tinfoil will protect one against government surveillance or mind control by extraterrestrial beings: you don’t need to be wearing a tinfoil hat to understand that your privacy might not be as private as you would think
More example sentences
  • Standard precautions apply - vigilance about unsolicited messages, updating AV protection, use of stronger passwords, tin-foil hats hats etc.
  • Wearing a tinfoil hat to deflect government mind-control radio waves is even more foolish than most people think.
  • This report will start the propellers spinning on every tinfoil hat in America.
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