It can be used for two different things LIKE: telling people to back back to their goat hole or Also known as a penis, dick, shlonk, Willy, wiener, or a pp.
Someone or something that bites your ankles.
To a postman, an ankle biter is often known as a dog.
To an adult, an ankle biter may be a toddler.
To hikers, an ankle biter is sometimes a tick.
And so on.