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noun, masculine

pétage de plombs

/pe.taʒ də plɔ̃/

noun, masculine/pe.taʒ də plɔ̃/plural: pétages de plombs

Descent into madness, the act or process of going crazy; Loss of control (of one's faculties)

From péter les plombs, with the nominalisation of péter to pétage.