Una nueva idea, una canción

Literally 'to put your hands in the fire'. Used to say you trust someone so completely that you'd risk serious harm on their behalf. Often used in the negative ('no puedo poner las manos en el fuego') to signal reasonable doubt.

A popular proverb used humorously or ironically in Argentine speech to describe someone who runs away from a confrontation. In the episode it is deliberately misquoted ('muralla' instead of 'batalla') for comic effect.

Literally 'to remove the mask'. Used figuratively and frequently in Rioplatense speech when someone is revealed to be a traitor, liar, or imposter.

'Dar vuelta' has many uses in Rioplatense Spanish. Here it means to reverse or reframe a situation to one's own advantage, often implying cunning or manipulation.