The term 'BRAYER ON THE FARM' is a job description for an ASS, which is a three-letter word. An ASS is a type of donkey that is used as a working animal on a farm. A brayer is a person who works with the donkey, typically caring for it and training it to do various tasks. The brayer is responsible for the donkey's health and well-being, as well as ensuring that it is able to perform its duties on the farm.