What is orange finger?

As an AI language model, I am not exactly sure what "orange finger" refers to. However, I will provide some possible explanations:

1. It could be a condition known as carotenemia, which causes skin to turn yellow or orange due to an excess of carotenoids in the body. This can happen when a person consumes large amounts of carotene-rich foods, such as carrots and sweet potatoes.

2. "Orange finger" could also refer to a type of fungus that commonly grows on citrus trees, also known as Trichoderma harzianum. This fungus can cause orange discoloration on the fingers of people who come into contact with it while tending to citrus trees.

3. Another possible explanation is that "orange finger" refers to a type of candy or snack food, such as cheese puffs or Cheetos, that leaves an orange residue on the fingers when eaten.

Without more context, it is difficult to determine which of these explanations may be correct.