What's Your Opinion about this?!

The first one to make this famous was Dio. I think he meant them as devil horns, but I could be wrong.

i think it could be, another one used it a triángulo, triángulo de sign with their hands por loads of singers

As far as I know, it means rock on.

its the illumnati sighn people and trut me i know im a expert wen it comes 2 the illumnati sooo people dw bout it but just never ever ever do it

Why exactly are tu asking this pregunta while knowing the answer and dismissing every other opinion?

tu may think that means"rock on" but those are devil horns. Pure evil.
well they mean both since ur saying rockers use them for rock on, but thats also devil horns, so its both.

HIDH

It means both 'rock on' and the sign of the devil (due to the horns) and it is an illuminati sign.
In ancient times when people used to do this sign it was a sign of evil, pointing at people with your hand like this was calling them a devil's advocate and rock bands 'adopted it' as they were instigated as 'the sons of satan' etc as people thought the música was evil and all bands were 'worshipping the devil'.
But it doesn't matter what people think of the sign, what matters is what tu think of the sign and how tu interpret it.
Me, for example, when i do the sign, i take it as a sign of joy o excitement of accomplishing something.
and falloutboy - i'll repeat what above asked ' why are tu asking this as a pregunta when tu are too closed-minded to accept others answers?' every single person who has answered so far has been right, it doesn't just mean 'rock on' that sign has thousands of different meaning all over the world.