Relating to or having good digestion or a consequent air of healthy good spirits.As late as 1927, the year of the first big sound film, the Jazz singer still sounded eupeptic about vaudeville's fortunes....
He was eupeptic where the woman was dyspeptic.
It was eupeptic down tonight in the woods, eh.
Origin
Late 17th century (in the sense 'helping digestion'): from Greek eupeptos, from eu 'well, easily' + peptein 'to digest'.