In all Romance-speaking countries, the word is cornuto/cornudo/etc. It seems to me as if it were a borrowed sign from them.
It's a sign used to scare the Devil away (popularised by RonnieJames Dio IIRC) that became a symbol of rock. The Power of Rock compels you to be good, VRWCAgent! Drop the conspiracy!You mean that idiotic thing people do at heavy metal concerts? If that's the case, Hygro loses one cool point.![]()