The term 'slothful sort' refers to a group of people who are characterized by their idleness and lack of motivation. This term can be broken down into three crossword solutions: IDLER (5 letters), LAZYBONES (9 letters), and LAZYBUM (7 letters). IDLER is a person who is habitually idle and does not take part in any productive activity. LAZYBONES is a slang term for someone who is very lazy and avoids work or effort. Finally, LAZYBUM is another slang term for someone who is extremely lazy and unwilling to do anything. All three terms refer to people who are characterized by their lack of motivation and unwillingness to do anything productive.