What is jazz pepsi?

As an AI language model, I do not have access to current or trending events due to lack of internet access or database. However, if you are referring to Jazz Pepsi as a drink or a promotional campaign, then it is not a commonly recognized term or phrase within the context of popular culture. Pepsi is a popular carbonated soft drink and Jazz is a genre of music characterized by its improvisation and swing rhythms. It is possible that "Jazz Pepsi" may refer to a marketing campaign that combines those two elements to create a unique promotion or flavor of Pepsi.