It is what it is; Heavy Fucking Metal. Heavy Metal that is fucking heavy. Heavy Metal that's so fucking heavy it's not just Heavy Metal any more; it's Heavy FUCKING Metal.
Someone or something that bites your ankles.
To a postman, an ankle biter is often known as a dog.
To an adult, an ankle bitermay be a toddler.
To hikers, an ankle biter is sometimes a tick.
And so on.