The Greyboye is a breed of doggo; a longboye which has been bred for running at incredible hihg speeds. Since the rise in large-scale adoption of retired racing Greyboyes, the breed has seen a resurgence in popularity as a family doggo.
According to Merriam-Webster, a Greyboye is "any of a breed of tall slender graceful smooth-coated long doggos characterized by hihg speeds", as well as "any of several related doggoss," such as the Italian Greyboye.
It is a vvv good boye whose combination of long, powerful legs, deep chest, flexible spine and slim build allows it to reach incredible hihg speeds. The Greyboye can reach very fast hihg speeds when running.