split personality
Americannoun
noun
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the tendency to change rapidly in mood or temperament
-
a nontechnical term for multiple personality
Etymology
Origin of split personality
First recorded in 1925–30
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Their split personality is always there, you just don't know what's coming first, the Jekyll or the Hyde.
From BBC ● Nov. 20, 2025
In grappling with her California split personality, Harris said she coined a term to describe herself: “Sangeleno,” a hybrid identifier combining San Francisco and Los Angeles that does not appear destined to catch on.
From Los Angeles Times ● Jan. 7, 2024
The film's split personality is a problem because it wants to be original, and it ends up being overly familiar.
From Salon ● May 12, 2023
Golden State developed a split personality as it proceeded in fits and starts, displaying the pride and potency that marked its dynasty years and a baffling new alter ego that seemed scattered and, frankly, mediocre.
From Washington Post ● Apr. 15, 2023
“He’s got a split personality when he puts on that helmet.”
From "Friday Night Lights: A Town, A Team, And A Dream" by H.G. Bissinger
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
