It was an innocent blunder of horse terminology being used on the general population. The words just rolled out of my mouth as if it was a commonly spoken phrase. My dentist was like, “Behind the vertical? Huh?”. What I was trying to explain was that my lower teeth were pulled in too much. With the use of my hand, I explained< "This is vertical: |. This is “behind the vertical: /. You know, curled in.”
Talk about the unconventional use of BTV and curled! Although if my teeth were a horse, BTV would be: \ .