Definition of rush ring in US English:

rush ring

noun

historical
  • A ring made of a rush or rushes, especially one used in a ceremony for a temporary or unofficial marriage.

Origin

Late 16th century; earliest use found in Edmund Spenser (?1552–1599), poet and administrator in Ireland. From rush + ring.

Pronunciation

rush ring

/ˈrʌʃ rɪŋ/