An individual who is of the shady kind. This type of person never calls you back and usually takes 24-48 hours to respond to a text message. On occasion, when you do converse with a Shade Pony, any question will be met with an off topic question to avoid giving any or too much information about themselves so they can remain a full blown Shade Pony.
Dude, did Jessie call you back?
Nah, that girl a Shade Pony fa sho.