Little Boy

American  

noun

1. the code name for the uranium-fueled atomic bomb dropped by the U.S. on Hiroshima in 1945.

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Compare meaning

How does little-boy compare to similar and commonly confused words? Explore the most common comparisons:

• Fat Man vs. Little Boy

Example Sentences

See Examples For:

Little Boy

After this successful test, the Gadget was succeeded by Fat Man and Little Boy, the two bombs dropped over Japan.

From The Wall Street Journal ● Aug. 7, 2026

And he has featured alongside another Liverpudlian, Stephen Graham, in Time, Little Boy Blue, and the recent historical drama A Thousand Blows.

From BBC ● Apr. 6, 2025

Fat Man and Little Boy are holding steady. apnews.com/article/dei-...

From Salon ● Mar. 10, 2025

The Fat Man bomb was dropped on Nagasaki on Aug. 9, 1945, three days after Hiroshima was devastated by Little Boy.

From Seattle Times ● Sep. 22, 2023

Enola Gay's aircrew released Little Boy, an atomic weapon whose blast equaled just under 13,000 tons of TNT.

From "Spies: The Secret Showdown Between America and Russia" by Marc Favreau