Potato in Spain — the exact same vegetable but with a different name than the rest of the Spanish-speaking world which says 'papa.' It's one of the classic Spain-vs-LatAm vocabulary differences.

A carefree, relaxed, or shameless person who doesn't get fazed by anything. Depending on context it can be a compliment (chill person) or a criticism (someone with no shame).

To take a shower in Spain and Argentina — bathing under the stream of water from the showerhead. It's the daily ritual that turns zombies into functional human beings.

The cargo space at the rear of a car in Spain and Argentina — what Mexico calls 'cajuela.' It's where suitcases, groceries, and random junk accumulate.