Answer:
What is full of holes but still holds water
To unravel me you need a simple key, no key that was made by locksmith's hand. But a key that only I will understand.
The itsy bitsy teeny weeny yellow polka dot variety is quite popular.
A leathery snake, with a stinging bite. I'll stay coiled up, unless I must fight.
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,' & my last three letters are a metal. Who am I?
When is it bad luck to see a black cat?