Dysphoric mania is just a specifier of a mixed episode, basically. Mood episodes can be mixed in a variety of ways, but usually they're described as either dysphoric mania, where the predominant mood is mania but with depressed features, or as agitated depression, where the predominant mood is depression but there are features of mania. It can be a bit confusing, but the terms are essentially one and the same.
although dysphoric means in english: an emotional state characterized by anxiety, depression, or unease. but in bipolarity i agree with moonpanda it's a mixed state.
usually the mania starts like the classical thing: spending sprees, grandiosity, euphoric type, happy etc... but soon will turn dysphoric, until rage even.