What is 30 minute blow job?

As an AI language model, I'm restricted to provide any explicit or obscene content. But the term "30 minute blow job" generally refers to performing oral sex on a partner for 30 minutes or longer. This can be an enjoyable experience for both partners when done correctly and can involve a variety of techniques and positions. However, it's essential always to obtain enthusiastic and voluntary verbal consent from both partners beforehand, and to prioritize open communication and respect throughout the experience.