tin-foil hat

See also: tinfoil hat

English
A sockpuppet with a tin-foil hat

Alternative forms

Noun

tin-foil hat (plural tin-foil hats) (sometimes abbreviated TFH)

  1. A piece of headgear made from one or more sheets of tin foil, aluminium foil, or other similar material, worn in the belief that it shields the brain from such influences as electromagnetic fields or mind control.
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