To dine with Duke Humphrey; to fast. In old St. Paul's church was an aisle called Duke Humphrey's walk (from a tomb vulgarly called his, but in reality belonging to John of Gaunt), and persons who walked there, while others were at dinner, were said to dine with Duke Humphrey.
DUKE HUMPHREY
Meaning of DUKE HUMPHREY in English
Slang English vocab. Английский сленговый словарь. 2012