I think this word may be uniquely Mexican. Metiche is used for someone who is nosy or a busy body. Someone who cannot keep their nose out of other people’s business is a metiche.

When I lived in Perú some years back, I remember we used the word sapo for this purpose. The idea is that a toad has big eyes and is always looking in on other people’s matters. However, I learned this while working at a church and school for the Deaf. It makes sense that the Deaf would use a word that focuses on big eyes to mean nosy. I have often wondered if that was an idiomatic usage confined to the Deaf in Perú, or if the hearing population used that term too. Any ideas?

This is a word that I would think changes from country to country, and maybe even within regions of the same country.