What is meaning of antidisestablishmentterrianism?

Answer 1

Confusionantidisestablishmentterrianism isn't a word. It's probably just mixed up with the word antidisestablishmentarianism which means opposition to the withdrawal of state support or recognition from an established church

Its a word.

Its actually the thought of being against the people who are against the government.

Its a hypothetical word:

It means an individual or a person who is against the system , the government , something that controls him/her.

Its been more famous after Will Smith said that's my favourite word. :)