N-SING (物或人的)杂集，大杂烩，混合体；（局势的）混杂 If you describe a situation or a group of things or people as a mixed bag, you mean that it contains some good items, features, or people and some bad ones. (物或人的)杂集，大杂烩，混合体；（局势的）混杂
Research on athletes and ordinary human subjects has yielded a mixed bag of results. [+ of]