'Insomma' is an Italian term that is often used to express different shades of meaning depending on the context. It can be used to convey a sense of mediocrity or ambiguity, such as when indicating that something is so-so or not too bad. It can also be used to express a lack of enthusiasm or agreement, as in the phrase not really. The precise meaning of 'insomma' depends on the context in which it is used.