The term 'BARKER OR KETTLE' can be summarized as two different occupations. The first is a Barker, which is someone who stands outside of a store or event and tries to attract customers by shouting out the goods or services being offered. The second is a Kettle, which is someone who works in a kitchen, usually boiling water or other liquids for cooking purposes. Both of these jobs require a certain level of skill and knowledge, and both are important roles in the hospitality industry.