lightning fast

Incredibly fast; too quick to keep up with. Hyphenated if used before a noun. Did you see that martial arts expert? His kicks were lightning fast! My brother has a lightning-fast wit.

See also: fast, lightning

See also:

(as) fast as lightning
speedball
as fast as the speed of light
lightning
fast
whip by
hold fast
hold fast to something
go at a fast clip
run at a fast clip

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