A general reference to those criminal cases that are called DUI, DWI, OUI, OWI, DUII, DWAI, or other acronyms. They generally describe two types of cases: first, where the driver is sufficiently impaired by alcohol, drugs, or a combination of the two, that the driver cannot drive safely. Second, "drunk driving" relates to those cases where someone is above that state's legal limit, usually .08, no matter how safely the person is driving.