What is duffer?

As an AI language model, I don't know the context of "duffer" you are asking for. "Duffer" can be a term that means:

1. A person who is a poor or incompetent golfer or a person who spends time ineffectually.

2. In British slang, duffer means a person who is eccentric or foolish.

3. In American slang, duffer means an old, unskilled or incompetent person.

If you provide me with more context, I can provide information on the specific meaning of the term you are looking for.