Definition of hard goer in US English:

hard goer

noun

  • 1A horse or rider possessing considerable stamina, or capable of traversing rough terrain (now chiefly Australian).

  • 2Informal a hard-living person; a person whose lifestyle is characterized by overindulgence or vigorous pleasure-seeking (now rare; chiefly Irish English in later use).

Origin

Late 18th century; earliest use found in The Morning Chronicle.