1.NounLightning in angular, zigzag, or forked flashes.
"smart as chain lightning (sharp-witted); faster than a cat lapping chain lightning"
2.Noun(A person or thing that is) very fast and dynamic.
"Hettie was chain lightning with a six-shooter."
3.NounA high-proof whiskey or other spirit that has not been allowed to mature; a poor-quality or adulterated spirit. .mw-parser-output .defdate{font-size:smaller}