Definition of rattle-head in US English:

rattle-head

noun

  • 1A Royalist in the English Civil War; a Cavalier. Contrasted with "roundhead". Now historical and rare.

  • 2An empty-headed person; = rattle-brain.

Origin

Mid 17th century. From rattle + head. Compare rattle-brain, rattlepate, rattle-skull.

Pronunciation

rattle-head

/ˈratlhɛd/