dialectical materialism
Applying dialectics to materialism, and vice versa. It is quite hard to pin down a set of rules for it, because that would make it dogmatic! But just apply what is dialectical thinking to a materialist worldview, i.e. believe in praxis.
Sometimes, when people refer to idealism they probably mean someone or something is being undialectical. But a dialectical movement composes of a mixture of both, requiring cognition and perception.