wolf hook

noun3

1. •
   (historical) A kind of trap used to catch wolves, consisting of an upper part resembling a crescent moon, meant to be fastened between tree branches, and a lower part (connected by a chain) in the form of a double hook, meant to be covered with meat and swallowed by a wolf.
2. •
   A thunderbolt drawn as a straight-edged runic s with a horizontal bar in the middle and the ends angled at 90 degrees centerwise, now especially when used as a Nazi symbol.
3. •
   A kind of modern-day assault rifle handle in a similar shape.