What's a Tin Foil Hat?

A tin foil hat is a hat made from one or more sheets of aluminium foil, or a piece of conventional headgear lined with foil, often worn in the belief or hope that it shields the brain from threats such as electromagnetic fields, mind control, and mind reading.

What is the meaning of tin foil hat?

Saying someone is "wearing a tin foil hat" or "is a tin foil hat" means that they have paranoia or a belief in conspiracy theories, especially involving government surveillance or paranormal beings. Originally, the term referred to the practice of wearing headgear consisting of metal foil to block mind-reading.

What does take off tin foil hat mean?

us/ˌtɪn.fɔɪl ˈhæt/ uk. /ˌtɪn.fɔɪl ˈhæt/ used when talking about people who believe in conspiracy theories (= the belief that events or situations are the result of secret plans by powerful people), especially to refer to something that protects them from these secret plans: Let's take off our tinfoil hats for a minute.