Faith is a belief in bullshit that couldn't possibly be true.

If an idea requires faith it's fair to say it's bullshit. A good example is every religious fantasy ever invented. None of these ridiculous fantasies (including the magic god fairy) have any evidence. It's just something people believe while never caring it's nothing more than wishful thinking. The god nuts call their disease "faith". A major part of all religious indoctrination is selling faith as something people should have. The professional brainwashers tell children they must have faith which means they must believe everything they are told to believe without questioning any of it and without expecting any evidence for it. Of course the brainwashers never mention the word "evidence". The victims learn about faith in god long before they find out evidence is required for everything else.

Some Christian assholes notice the ridicule they get for believing in bullshit so they invent evidence so flimsy any scientist would laugh at it. For example they think the bullshit in their worthless Bible is evidence. Or they think a dead gullible witness is evidence.

Biologist PZ Myers has a blog where he wrote about faith and where one of his minions wrote about it. They are the best explanations of the bullshit called faith I have seen.

FAITH. No one word personifies the absolute worst and most wicked properties of religion better than that. Faith is mind-rot. It’s the poison that destroys critical thinking, undermines evidence, and leads people into lives dedicated to absurdity. It’s a parasite regarded as a virtue.
PZ Myers

Faith is by definition belief without evidence – it’s pulling things out of your ass; it’s clinging to things that you might well know are faintly ridiculous; it’s putting up barriers to honest inquiry; it can be used as an impediment to curiosity and intellect, and it is simply the most ridiculous method of discovering or knowing anything about reality. It’s not a virtue – and it shouldn’t be a virtue in wider society any more than it would be in a court of law.            

Heather Dalgleish