A "Geek" and a "Nerd" combined, usaully a breed only ofund at places such as E-3 and anime expo's. They travel endlessly buying "shwag" from crappy merchandises such as star wars toys, and fake grenades.
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.