8
based on the idea that tin foil protects your brain from being read, this term may also refer to people who embrace paranoid or conspiracy theories. especially used by leftists when referring to far leftists.
Did you see the Tin Foil Hat ranting about aliens controlling the media? His conspiracy theories made the rest of us look like nuts!
by Jennifer Lizak September 21, 2007
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9
alien technology that make people crazy. once removed from head will have a million uses. it often seen on a head of a man/woman who appears insane. again it has a million uses such as heating a potato getting a tan and if turned inside out can cool you down on a hot day
"hey my potato's cold"

"here use my tin foil hat it should heat it up in no time"
"thanks"
by chris cooper alabama April 23, 2010
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10
something the kids wear in the movie "Signs"
"so the aliens can't read our minds"
by no-emo June 30, 2005
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