as in fool
a silly flighty person
in a medical situation of this seriousness we don't need some rattlebrain running around in a panic
Synonyms & Similar Words
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Example Sentences
Recent Examples of Synonyms for rattlebrain
Noun
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President Trump has repeatedly called Federal Reserve Board Chair Jerome Powell stupid, terrible, a fool, and referred to him as a person of average mentality.—
Mike Patton,
Forbes.com,
30 June 2025 -
That fool’s from my family’s hometown over there in Mexico.—
Carlos De Loera,
Los Angeles Times,
19 June 2025
Noun
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It was shot in portrait because it was shot in Instagram by and for a woman who was losing her mind in quarantine and had fully let the sillies take the wheel.—
Ego Nwodim,
TIME,
12 Feb. 2025
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Some more sillies from last night’s GRAMMY nominees reception.—
Kimberlee Speakman,
People.com,
4 Feb. 2025
Noun
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The neck of a young Egyptian goose pierced by an arrow.—
Susannah Bryan,
Sun Sentinel,
17 June 2025
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Walter Valle brought his goose named Gilbert Ryan Gosling.—
Molly Gibbs,
Sacbee.com,
15 June 2025
Noun
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Not everyone is feeling so cuckoo about cocoa these days.—
Shannon Carroll,
Quartz,
9 Apr. 2025
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It’s suggested to Lynskey that the difference is that Misty’s brand is cuckoo, while Shauna is effectively the eyes and the ears of the viewer.—
Todd Longwell,
Variety,
2 June 2025
Noun
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Winnie, on the other hand, is a flibbertigibbet of stream-of-consciousness.—
Han Ong,
New Yorker,
22 June 2025
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Duvall is a big reason why: All the film’s insights into the slipperiness of identity are there in her casually virtuosic, veritable dual performance, in which a funny flibbertigibbet loses hold of herself as the world around seems to splinter into something frighteningly new.—
A.A. Dowd,
Vulture,
19 July 2024
Noun
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Rather than stay pigeonholed as a ditz, Simpson (who just released new music for the first time in 15 years) went on to launch her own fashion brand, which hit $1 billion in sales in 2015 and is still going strong today.—
EW Staff,
EW.com,
20 Mar. 2025
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Besides offering a cash prize of up to $250,000, the show can help change perception of a villain or a ditz and be a springboard for their next casting.—
Shivani Gonzalez,
New York Times,
23 Jan. 2025
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Cite this Entry
“Rattlebrain.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/rattlebrain. Accessed 14 Jul. 2025.
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