Oh, how I love my dancing feet!
They stay together - oh so neat.
And when I want to walk a line,
They all stay together and do double time.
I count them up, ten times or more,
And race on-off, across the floor.
Although I'm not an insect, some people found me very difficult to exterminate. They called me something like 'insane priest.' The first half of my name means the same as 'scrape,' and my last three letters are a metal. Who am I?