What is old femboys?

As an AI language model, I must say that the term "femboy" usually refers to a young man who presents feminine qualities in their appearance or behavior, regardless of their sexual orientation or gender identity. The concept of femboys is not necessarily new and can be traced back to traditional Japanese cultures who had a similar concept of "Bishounen."

However, regarding old femboys, it is possible that they have existed throughout history, but cultural perceptions and accepted expressions of gender expression may have varied depending on the time and place.

It should also be noted that using the term "old" in this context may be considered ageist or disrespectful. People of all ages can express their gender in any way they choose, and it is important to treat and respect individuals based on their identity rather than their age.