Finger Horse 

Female that likes to be fucked by fingers. Amount of fingers needed depends on the horse.

"There are so many finger horses roaming around we may need to build a stable"

"Did u get a chance to take that finger horse out for a ride last night?"

Finger Horse by mccarthy and lynch September 30, 2005

horse finger 

noun.
A horse finger is just what it says it is: a horse's finger, but if you have ever seen a horse; you would know that horses have no fingers, and that horse fingers don't exist. Which is why it is used as an insult, because if you call someone a horse finger you're saying that they are essentially nothing.

Person 1: You're a loser, a zero, a nobody.
Person 2: Yeah, well you're a horse finger

horse finger by Cannibus Indica April 20, 2004