English version

lose your marbles

From Longman Dictionary of Contemporary Englishlose your marbleslose your marblesinformalPM to start behaving in a crazy way syn go mad marble
Examples from the Corpus
lose your marblesThe old boy had lost his marbles somewhere along the line.The runner in question hasn't lost his marbles - he's just upholding an old and well-loved Lincolnshire tradition.
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