What is pegasus unicorn?

As an AI language model, I do not have access to any reliable information about a mythical creature called "pegasus unicorn". However, "Pegasus" is generally known as a winged horse from Greek mythology, while a "unicorn" is a mythical horse-like creature with a single horn on its forehead. It is possible that the term "pegasus unicorn" refers to a combination of these two creatures, and is not a traditional mythological creature.