Season 1 · Episode 8
Violetta
A musically-talented teenager returns to her native Buenos Aires after living in Europe.

Very common in Argentine River Plate speech. Refers to an embarrassing situation, usually public. Not deducible from 'papel' (paper/role) alone.
Fixed adverbial phrase. 'Escondidas' alone means 'hide-and-seek' or 'hidden things', so the full phrase carries a specific nuance of doing something covertly to avoid detection by someone with authority.
Reflexive fixed expression. Implies deliberate feigned ignorance, often to avoid accountability. The 'hacerse' construction signals performing a false state.
Used with negation ('no estoy de ánimo') to signal that someone is not emotionally available or up for something. More personal and emotional than simply 'tener ganas'.
Regional fixed expression. Means to believe something uncritically, usually implying you were naive to do so. 'Cuento' here means a fabricated story, not a fairy tale.
Derives from 'ubicación' (location/place), but means someone who does not know their social place or acts inappropriately for the context. Cannot be guessed from 'ubicado' (located).