ˈFoggy ˌBottom a humorous name given to the US
State Department because of the
fog (=thick mist) that often surrounds its offices in Washington, D.C.
[TahlilGaran] Dictionary of Contemporary English ▲
foggy bottom n.,
slang An area in downtown Washington, D.C. where many offices of the Department of State are located; hence figuratively, the U.S. Department of State.
The press secretary gave us a lot of foggy bottom double-talk about the hostage crisis in the Near East. [TahlilGaran] English Idioms Dictionary ▲