Also known as the metal hand
or satan hand
. Often seen in the following configuration
when geeks 'talk' about metal:
\m/ 666 \m/
According to the yahoos at the church camp I went to (don't ask), it's called the satan hand because it's supposed to represent a goat's head, and also because the index finger, thumb and pinky form three 6's with the curled middle and ring fingers.