Meaning
To kick the bucket / to bite the dust
Example
O bicho de estimação bateu a caçuleta de velhice.
The pet kicked the bucket from old age.
Origin
Caçoleta (the standard form) entered Portuguese via French cassolette and originally named the small priming pan of an antique flintlock — the part struck by the cock to fire the shot.
Source: Ciberdúvidas — Bater a caçoleta.
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More idioms
Acertar na moscaTo guess correctly / To hit the nail on the headAmigo da onçaA fake/false friendAndar na linhaTo toe the line / To behave properlyArmar um barracoTo cause a public sceneRodar a baianaTo cause a public scene / To go ballisticArrumar sarna pra se coçarTo ask for troubleArrastar as asasTo hit on someone / To flirtAbrir o jogoTo come clean / To open upArregaçar as mangasTo roll up one's sleeves / To get to workAgarrar com unhas e dentesTo hold on for dear life / To seize an opportunity