speed demon
noun
chiefly US, informal
: someone or something that moves or works very fast
The new cook is a regular speed demon.
This computer is a real speed demon compared with/to my old computer.
Examples of speed demon in a Sentence
Recent Examples on the Web
Styles isn’t quite the speed demon that Isaiah Simmons was coming out of Clemson, but there are certainly similarities between the two as former safeties and rare size-speed athletes.
—
Dane Brugler, New York Times, 29 July 2025
Performance and Image Quality The X-Pro2 is a speed demon.
—PC Magazine, 23 July 2025
This model's 250-W rear-hub motor might seem a little underwhelming for the US market, for example, but the bike isn't designed to be a speed demon, but rather an easier way to rock the commute.
—New Atlas, 4 July 2025
The Packers have their No. 1 wide receiver of the future and maybe even the present with a bona fide speed demon who will soon become one of quarterback Jordan Love’s best friends.
—Matt Schneidman, New York Times, 25 Apr. 2025
There are plenty of reasons to squeeze in a trip before peak season starts, whether to soak up Caribbean culture at an under-the-radar literary festival or embracing your inner speed demon at one of F1’s most hairpin-turn-heavy circuits.
—Mark Ellwood, AFAR Media, 6 Mar. 2025
There’s more to the open-top speed demon than the man who raced it, though.
—Bryan Hood, Robb Report, 11 Feb. 2025
Another oddity is that there is a speed demon of a galaxy that is barreling through another cluster of galaxies at 3.2 million km/h (2 million mph).
—David Szondy, New Atlas, 18 Jan. 2025
This yacht is meant to be user friendly rather than a roaring speed demon.
—Kevin Koenig, Robb Report, 2 Dec. 2024
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Dane Brugler, New York Times, 29 July 2025
Performance and Image Quality The X-Pro2 is a speed demon.
—PC Magazine, 23 July 2025
This model's 250-W rear-hub motor might seem a little underwhelming for the US market, for example, but the bike isn't designed to be a speed demon, but rather an easier way to rock the commute.
—New Atlas, 4 July 2025
The Packers have their No. 1 wide receiver of the future and maybe even the present with a bona fide speed demon who will soon become one of quarterback Jordan Love’s best friends.
—Matt Schneidman, New York Times, 25 Apr. 2025
There are plenty of reasons to squeeze in a trip before peak season starts, whether to soak up Caribbean culture at an under-the-radar literary festival or embracing your inner speed demon at one of F1’s most hairpin-turn-heavy circuits.
—Mark Ellwood, AFAR Media, 6 Mar. 2025
There’s more to the open-top speed demon than the man who raced it, though.
—Bryan Hood, Robb Report, 11 Feb. 2025
Another oddity is that there is a speed demon of a galaxy that is barreling through another cluster of galaxies at 3.2 million km/h (2 million mph).
—David Szondy, New Atlas, 18 Jan. 2025
This yacht is meant to be user friendly rather than a roaring speed demon.
—Kevin Koenig, Robb Report, 2 Dec. 2024
Cite this Entry
“Speed demon.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/speed%20demon. Accessed 20 Aug. 2025.
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