The Twisted World of Marge Simpson

Augmentative-pejorative of 'rico'. Implies not just wealth but arrogance or privilege. The plural 'ricachones' is common. Used with a dismissive or envious tone.

Fixed idiom. 'Varas' are old units of measurement. The image is of putting on a shirt far too large for you. Used to warn someone they are getting into a complicated situation unnecessarily.

On paper this looks compositional, but in spoken Latin American Spanish it functions as a set positive reaction, often stronger than the literal meaning. Said with genuine approval, not faint praise.

Reflexive fixed phrase. Suggests surrendering to an impulse, mood, or crowd. Can be positive (enjoy the moment) or negative (lose judgment).