'machine-gun' definitions:

Definition of 'machine-gun'

From: GCIDE
  • machine-gun \machine-gun\, machine gun \machine gun\a. Occurring in rapid succession, like the firing of a {machine gun}; as, Tom was a persuasive speaker, with a smooth deep voice, polysyllabic vocabulary, and a machine-gun articulation that overwhelmed listeners.
  • Syn: rapid-fire. [PJC]