Hi, my name is "kat" and i like to use people for things they have cuz like my Third World fellow in China, i don't have the dough it takes to live in PC...
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.