People who still want the mental crutch of Religion, but want to be as vague as possible about it so its harder to argue with their bullshit. These people generally lack the ability to form coherent logical arguments, struggle to think carefully and deeply about subjects and don't like the rules and restrictions imposed by Religion. Their position is so vague as to become difficult to argue against, allowing them to not only benefit from the mental crutch that usually is attached to religion, but hold a smug air of superiority that will piss off any reasonable critical thinker no end.
Bill: "What do you believe in?"
Jill: "I'm spiritual."
Bill: "So what does that even mean? Do you believe in spirits? Religion? God? Faries? Science? How does spirituality even have an application in your life?"
Jill: "No, I don't believe in religions, look how harmful they are to the world, I am spiritual."
Bill: "So basically, you hiding behind a wall of vague bullshit and feeling comforted by your mental crutch?"
Jill: "Once you in touch with your spiritual side, you'll understand."
Bill: "Once you stop being vague and full of bullshit, we can actually have an intelligent discussion".