Main term: tinfoil Derivatives: tinfoily, tinfoiler, tinfoil hat, tinfoilhattery ... Colloquial funny term used in all imaginable forms, that is: noun, adjective, adverb and even verb. Your definition or explanation: Its origin seems to be a self-made tinfoil hat some paranoid people put on their heads to prevent that their minds could be telepathically read or controlled by aliens or whoever with this supernatural power. However, its meaning somehow has evolved into scorning people that tend to believe in any kind of conspiracy theories, to ridicule these theories themselves, and/or even just to deride argumentations with hardly believable conclusions not enough well grounded on facts or which distort them conveniently for the sake of a preconceived odd conclusion. The best explanation is here. Examples: One or more places you have seen the term: http://en.wikipedia.org/wiki/Tin_foil_hat http://www.google.es/search?client=opera&rls=es-LA&q=%22tinfoil+explanation%22&sourceid=opera&ie=utf-8&oe=utf-8 http://www.google.es/search?client=opera&rls=es-LA&q=tinfoily&sourceid=opera&ie=utf-8&oe=utf-8 http://www.google.es/search?client=opera&rls=es-LA&q=tinfoilhattery&sourceid=opera&ie=utf-8&oe=utf-8 http://www.urbandictionary.com/define.php?term=tinfoil hat http://www.urbandictionary.com/define.php?term=tinfoiler http://www.urbandictionary.com/define.php?term=tinfoilhattery http://www.urbandictionary.com/define.php?term=tinfoily Have you looked for this term or meaning in dictionaries, and not found it? Yes ____ No ___ Excuse my English, please.