Definition of like (greased) lightning in US English:

like (greased) lightning

phrase

  • Very quickly.

    promptly, immediately, instantly, instantaneously, without delay, post-haste, in a flash, in a trice, in the wink of an eye, in an instant, in no time, in no time at all
    rapidly, quickly, fast, speedily, briskly, at high speed, at full tilt, like the wind, like lightning, at breakneck speed, as fast as one's legs can carry one, as swift as an arrow
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