falstaffian [fɔlˈstæfiən] a.
1.) Characterized by joviality and conviviality (American Heritage Dictionary of the English Language).
Etymology: After Sir John Falstaff, a character in Henry IV, Parts I and II, and The Merry Wives of Windsor by William Shakespeare.
"An affable Irregular,
A heavily-built Falstaffian man,
Comes cracking jokes of civil war
As though to die by gunshot were
The finest play under the sun."
("Meditations in Time of Civil War", William Butler Yeats, 1923)