Duffers is a slang word commonly used to refer to people who lack the requisite abilities or skills to perform a particular task. This word is usually used in a humorous way, implying a general lack of competence or aptitude. While the term duffers is not a particularly flattering label, there are many synonyms that can be used to describe someone in similar terms. These synonyms include phrases like incompetent, bungling, inept, unskilled, clumsy, and unqualified. Each of these words can be used to describe someone who is not effective at a particular task or who is generally unable to perform at a high level. Regardless of the word choice, it is important to use language that is respectful and constructive when describing the abilities of others.