Lose your marbles
Meaning
To become mentally confused, irrational, or insane.
Origin
The phrase 'lose your marbles' vividly conjures the image of a child's collection of small, colorful glass spheres scattering and vanishing, leaving nothing behind. In the 19th century, playing with marbles was a hugely popular pastime, and a child's marbles represented not just their toys but often their prized possessions, sometimes even their currency in playground games. To 'lose your marbles' literally meant to lose these valuable objects, signifying a loss of one's faculties or possessions. This simple, tangible loss of small, round objects—representing order and mental capacity—metaphorically evolved to describe a profound mental disarray, as if one's very thoughts and reason had rolled away, irretrievably lost.
Examples
- After working 80 hours a week for months without a break, I truly felt like I was going to lose my marbles.
- My eccentric aunt has started to lose her marbles a bit, sometimes forgetting where she's placed her keys moments after putting them down.