Gut courses are courses that are difficult and require a lot of hard work. The term 'gut courses' is derived from the two crossword solutions, 'throats' (7 letters) and 'easyas' (6 letters). Throats is a reference to the difficulty of speaking or swallowing something that is hard to do, while easyas is a reference to the difficulty of completing a task that is not easy. Together, these two words form the phrase 'gut courses, ' which is used to describe courses that require a lot of effort and dedication.