A tool (organic or inorganic) used to stimulate yonis. Can refer to a dildo, vibrator, cock, dong, etc., but especially used for a larger implement that will really take her for a ride!
Becky wasn't totally satisfied by her man so she stopped by Good Vibes to get herself a yoni pony.
Man I love to watch that girl and her yoni pony!
After she was through with my yoni pony, I immediately fell asleep.
I use my yoni pony to make that pussy pony!