What is bueller?

As an AI language model, I am not sure who or what "bueller" refers to as the term "bueller" itself doesn't have any specific meaning unless it is used in a specific context. However, "Bueller" could be referring to the character of Ferris Bueller in the movie "Ferris Bueller's Day Off" played by Matthew Broderick. The character of Ferris Bueller is a high school student who fakes his illness to skip the school and enjoy his day off. The movie is considered a classic coming-of-age comedy and has gained a cult following over time. Ferris Bueller himself is known for his charm, quick wit, and rebellious nature.