Lost one's marbles
Meaning
To lose one's mental faculties, ability to think clearly, or sanity; to behave in a very eccentric or irrational way.
Origin
In the vibrant playground of the late 19th and early 20th centuries, children's games often provided vivid imagery for the English language. One such game, played with small, prized glass or clay spheres, was marbles. A skilled player carefully guarded their collection, each marble representing a tiny, tangible piece of their success and status. The thought of 'losing one's marbles' didn't just mean misplacing a toy; it evoked a sense of confusion, disarray, and a definite loss of something valuable and essential. This literal image of small, precious objects scattering and disappearing morphed into a metaphor for a scattering of one's thoughts, a loss of mental clarity, or even a slip into eccentricity, painting a clear picture of a mind no longer neatly organized but instead jumbled and astray.
Examples
- After working eighteen-hour days for a month straight, I felt like I was starting to lose my marbles.
- My grandmother is getting on in years, and sometimes she seems to have lost her marbles, forgetting where she put her keys multiple times a day.