The term "lumpkin" refers to a lazy or foolish person. There are several synonyms that can be used to describe such a person. One option is "slacker," which suggests someone who shirks responsibilities and has a lack of ambition. "Bum" is another synonym that connotes laziness and a lack of motivation. "Airhead" or "dope" can be used to describe a person who is foolish or not very bright. "Slob" or "mess" can imply a person who is untidy and disorganized, potentially due to their laziness. Overall, using synonyms for "lumpkin" can help to vary language and provide a clearer picture of the type of person being described.