Vermicious just means "wormlike" and knids are a type of worm.
This is not a real item for sale. Instead, this is the silly fake product (based on a literary reference) we use in-house to help us troubleshoot client issues with any of the features on our site. Since we don't actually sell worms here at CysterWigs.com, we highly advise against adding this goofy listing to your cart. ;)