track rat (noun)
One who is addicted to the life at the race track. A person who centers all priorities around the act of returning to the track when away from the track. Any person who considers the racetrack their second home. Many track rats confuse the track with their first home and would never leave, given the choice.
While many track rats hide their identities, track rats can be identified by their insatiable desire to talk about the track in every conversation, regardless of the original topic.
When found in packs, they tend to consume large amounts of alcohol which only increases the amount of talking they do about the track.