Definition of good King Harry in US English:

good King Harry

noun

rare
  • The plant good King Henry, Chenopodium bonus-henricus.

Origin

Late 16th century; earliest use found in John Gerard (c1545–1612), herbalist. From good + king + the male forename Harry, apparently as alteration of good Henry by association with one of the kings of England who bore the name Henry.

Pronunciation

good King Harry

/ˌɡʊd kɪŋ ˈhari/