rabo de lagartija

1.
SpainLatin Americaneutral
- The tail of a lizard; a literal anatomical description.
2.
SpainLatin Americacolloquial
- A small, insignificant remnant or leftover; something minor or negligible.

Examples:

ES: Con este equipo he podido capturar imágenes fantasmagóricas de muestras que fueron cortadas en dos, el vestigio de un rabo de lagartija mucho después de haber sido cortado.
EN: You know, with this equipment, I have been able to capture phantom images... ..of whole leaves that were cut in half,... ..or the vestigial image of a lizard's tail long after it's been cutoff.
ES: No lo sé, supongo que soy un rabo de lagartija.
EN: BRANDO: I don't know, I guess I've just got loose feet.
ES: Era un poco "rabo de lagartija" en el otro lado.
EN: I was a little squirrelly on the other side.
ES: Pareces un rabo de lagartija.
EN: You're restless like a fish in hot water.