Loutish types are people who are boorish, rude, and ill-mannered. The term 'YAHOOS' is a reference to the character of the same name in Jonathan Swift's novel Gulliver's Travels. In the novel, YAHOOS are described as brutish, uncivilized creatures who lack any sense of morality or decency. Therefore, the crossword solution of 'YAHOOS' for the term 'Loutish Types' is an apt description of people who are uncouth and ill-mannered.