"One Trick Pillow Ponies" is a phrase that does not have a standard or widely recognized meaning. However, it could be interpreted as referring to ponies that are only able to perform one trick or skill, or it could be a playful term for decorative pillows shaped like ponies.

In a broader sense, the phrase "one trick pony" is a commonly used idiom that refers to a person or thing that is limited in its abilities or expertise, often able to perform only one thing well. It can be used to describe someone who has a narrow focus or specialized skill set, but may struggle with tasks outside of their area of expertise.

Overall, the meaning of "One Trick Pillow Ponies" would depend on the context in which it is used and the intended interpretation.