Gianna: oh my god thesack is so ugly!
pinky: yeah, he snapchatted me and he wanted to be in our guy fieri gang!
Gianna: ew wtf?
pinky: yeah his neck looks like a nutsack!
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.