the.com/tinfoil
the metal you wear to keep the government out of your head, allegedly.
means a thin sheet of aluminum foil, and shorthand for paranoid conspiracy thinking when worn as a hat.
from the material started as actual tin foil in the 1800s until aluminum got cheaper and took over the kitchen drawer by the 1940s; the hat myth traces to a 1927 sci-fi story imagining metal caps blocking mind-control rays, which pop culture never let go.
actually aluminumtin was phased out decades ago, name stuck anyway
signal blocker mythfoil hats can amplify certain radio frequencies, not block them
phrase born 1927julian huxley story first floated metal-cap mind protection