The idiom "lose your marbles" means to go crazy or lose your mind. It is a figurative way of saying that someone has lost their sanity or their mental faculties.

lose (one's) marbles To be or become mentally deficient, incompetent, or deranged; to become of unsound mind. My poor grandmother started losing her marbles after she had a stroke. I've been so …

4 days ago · The meaning of LOSE ONE'S MARBLES is to become insane. How to use lose one's marbles in a sentence.

To ‘lose one’s marbles’ is to lose one’s mind. In the 1954 film The Caine Mutiny Humphrey Bogart linked insanity with marbles when he showed his character, the demented Lt. Cmdr. Queeg, restlessly …

If you say that someone has lost their marbles, you mean that their ideas or behaviour are very strange, as if they have become insane.

You can use "Lose your marbles" to describe someone who is becoming crazy or losing their sanity. It's often used in a lighthearted or humorous way, but it can also be used to express genuine concern for …

Aug 22, 2025 · Lose one’s marbles – an informal idiom meaning to become mentally confused, crazy, or irrational. Think of it as someone losing their grip on reality or acting in a way that seems a little out …

Dec 6, 2022 · The concept of “ losing your marbles ” is said to have begun in the United States in the late 1800s. Long ago, children’s favorite toys were marbles, the little metal or glass balls used in …

Sep 8, 2024 · The phrase “lose your marbles” means to become confused or to act in a silly way, often because you are unable to think clearly anymore. It suggests that a person is losing their common …

Dec 29, 2025 · To “lose your marbles” means to lose your mind, become mentally unstable, or experience confusion or forgetfulness. It can describe someone temporarily overwhelmed or out of …