Definition of rabiator in English:

rabiator

Pronunciation /ˈrabɪeɪtə/

noun

rare Scottish
  • A violent, greedy, or ruthless person; a plunderer; (also more generally) a scoundrel.

Origin

Mid 16th century; earliest use found in David Lindsay (c1486–1555), writer and herald. Origin uncertain; perhaps from post-classical Latin robiator, roberator, robator robber, perhaps influenced in form by its cognate Italian rubatore robber.