Definition of like greased lightning in US English:

like greased lightning

phrase

informal
  • Extremely fast.

    • ‘Another gig of memory will make it run like greased lightning.’
    • ‘And it is then, in the first of several miracles, that he sprints like greased lightning.’
    • ‘It glides like greased lightning, making ironing fast and easy.’
    • ‘Get it on the highway, and it moves like greased lightning.’
    • ‘'Your husband is climbing up that rope like greased lightning,' he informed her.’