a wise man of Gotham
obsolete A thoroughly stupid person; a fool. I have concluded that he is but a wise man of Gotham, and so I cannot in good faith trust him to run any part of my business.
a wise man of Gotham
a foolish person. dated Gotham is a village in Nottinghamshire which is associated with the folk story The Wise Men of Gotham, in which the inhabitants of the village demonstrate their cunning by feigning stupidity. Gotham is now a nickname for New York City, used originally by Washington Irvine but later linked particularly with the Batman stories.