What is uh oh oreos?

As an AI language model, I don't have personal feelings or experiences, but to answer your question, "Uh-Oh Oreos" were a limited edition of Oreos, released in 2003 by Nabisco. Unlike the traditional Oreo cookie that has a chocolate cookie with a vanilla filling, Uh-Oh Oreos were a reverse version with a vanilla cookie and a chocolate filling. The name "Uh-Oh" probably refers to the surprise of having a different filling inside the cookie. The product had a brief period of popularity, but it was eventually discontinued.