Un ultimátum, una canción

Used to compliment someone's physical appearance in an informal, playful way. Common across River Plate Spanish. Can be affectionate or flirtatious depending on context.

A distinctly Rioplatense term of mild mockery, often used between siblings or close friends without being deeply offensive. Suggests someone is out of touch or acting silly.

The standard Argentine word for popcorn, derived from an indigenous term. Completely opaque to speakers unfamiliar with Rioplatense vocabulary.

A fixed reflexive phrase. 'Haciéndose la desentendida' is the feminine form. Signals that the speaker believes the other person is deliberately feigning ignorance.

Literally means brother-in-law, but in informal Argentine speech it can be used between men who are not actually related, as a term of camaraderie or to signal closeness.

A fixed moral imperative using 'obrar' (to act/behave), which is more formal and literary in feel than 'hacer'. The vos imperative form 'obrá' is specific to Rioplatense conjugation. The phrase signals a serious, ethical call to action.