Congou \Con"gou\, Congo \Con"go\, n. [Chin. kung-foo labor.]

Black tea, of higher grade (finer leaf and less dusty) than the present bohea. See Tea.

Of black teas, the great mass is called Congou, or the ``well worked'', a name which took the place of the Bohea of 150 years ago, and is now itself giving way to the term ``English breakfast tea.'' --S. W. Williams.

Source: Webster's Revised Unabridged Dictionary (1913)