Meaning
how annoying! or someone with a bad smell
Example
Tá cá murrinha essa chuva que não passa.
This rain that won't stop is so annoying.
Origin
Murrinha is an unpleasant smell or an animal illness, but in Recife it became a synonym for a dull situation or boredom.
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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