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Lose one's marbles

To lose your marbles is to go mad. This is an idiom used in informal contexts.

  • Rahul was earning a six figure salary so his decision to quit his job puzzled his parents. They thought that he had lost his marbles.
  • Have you lost your marbles? Why donít you lock the doors before you leave?
  • Uncle Gupta has lost his marbles but that is hardly surprising. He is ninety-eight.
  • Uma must have lost her marbles. She has put her five-year old daughter on a diet.
  • The man said that he would lose his marbles if he spent another day with his wife.

If somebody is mentally sound, then you can say that they have all their marbles.

  • My grandmother is over 90 years old, but she still has her marbles.

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