Duffless

Common throughout Latin America. Used when someone says or does something embarrassing or mistaken, often socially awkward. Not region-specific.

In everyday speech 'alterar' can mean to disrupt, to upset, or to tamper with something. When applied to a person it signals emotional agitation. The sense of intentionally disrupting a process for fun is a colloquial extension not obvious from the dictionary sense alone.

The phrase 'pasamos estupendos momentos' is a warm, slightly ironic or sentimental way of addressing something (or someone) you are saying goodbye to. It is non-compositional in that it can be used to bid farewell to an inanimate thing as if it were a person, carrying an affectionate or mock-melancholic tone.