What does “ratero” mean in Spanish?

Ratero builds directly on rata, “rat,” plus the suffix -ero for “one who does something” — a thief who operates the way a rat does: small, quiet, never taking enough to be caught. It’s not the word for an armed robber or a con artist running a big scheme; it’s specifically the low-level, sneaky kind of stealing. In this clip, a mother sizing up her daughter’s new boyfriend spits out novio ratero as an instant, damning verdict.

The metaphor is consistent across Spanish: a rata in slang can also mean a stingy person or a snitch, always carrying that same sense of something small, sly, and beneath contempt. Calling someone un ratero is sharper than simply calling them a ladrón (“thief”) — it’s not just an accusation of theft, but of doing it in the most cowardly, small-time way possible.