Una decisión amorosa, una canción

Means deliberately feigning ignorance of something one clearly knows. Not guessable from the literal 'to make oneself the unaware one.'

Means to successfully impose one's will or agenda, often despite opposition. Carries a mildly negative tone, implying someone is manipulative or stubborn.

Used to warn someone that their strategy or behavior risks a serious negative backlash. While the image exists in English, in Argentine colloquial speech it is the standard idiomatic warning and carries genuine urgency in this context.

Used to assert confident command of a situation, often ironically when the speaker clearly does not. Slightly boastful in tone here.