(dated) Synonym of know what is what

The name of a number of islands in various places, as well as a promontory in Ireland. / An island in Trinidad and Tobago. / A former town in Quebec, Canada, now part of Stanstead.

An extinct species of merganser, Mergus australis.

One of 83 counties in Michigan, United States. County seat: Rogers City.

A city in Aroostook County, Maine, United States. / An unincorporated community in Presque Isle Township, Presque Isle County, Michigan, United States.

Alternative form of all one's taste is in one's mouth

(idiomatic, mildly insulting) One lacks good taste in aesthetic or cultural matters.

One of 39 counties in Washington, United States. County seat: Coupeville.

An island and census-designated place in the Columbia River, Wahkiakum County, Washington, United States.

Someone from the US Virgin Islands