Devil horns ... is pretty much owned by Black Sabbath's Ronnie James Dio, who is widely credited with introducing it to popular culture. And of course the sign of the horns has a long history ...

I feel like I should be doing something back to them.’ He says, ‘What’s that sign that you do in ‘Black Sabbath’?’ And I showed him the devil horns sign. And he started doing it from there and made it ...