Meaning
to throw up or to be exhausted
Example
Corri tanto que quase botei os bofes pra fora.
I ran so much I almost threw up.
Origin
A reference to the lungs (bofes, an animal's lights), suggesting physical exhaustion so extreme you could cough them up.
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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