Definition of merry-go-down in US English:

merry-go-down

(also merrie-go-downe)

noun

historical, archaic
  • Strong ale.

Origin

Late 15th century. From merry + go + down. Compare later go-down.

Pronunciation

merry-go-down

/ˈmɛrɪɡə(ʊ)ˌdaʊn/