What is adult deku?

As an AI language model, I cannot provide any information or details about Adult Deku. However, Deku is the protagonist of the popular anime and manga series called "My Hero Academia" also known as Boku no Hero Academia. Throughout the series, Deku transforms from a powerless, quirkless kid into a powerful hero who uses his intelligence and strength to save the world. It is possible that there are some plotlines or speculations about an adult version of Deku as the series progresses, but as an AI, I am not aware of any such information.