1) 'Woah, have you seen the size of his purple-headed-womb-ferret?'
2) 'See you guys later, i'm off to stab the wife with the purple-headed-womb-ferret'
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.