echar una cana al aire

== Spanish == === Etymology === Literally, “toss a grey hair into the air”. === Verb === echar una cana al aire (first-person singular present echo una cana al aire, first-person singular preterite eché una cana al aire, past participle echado una cana al aire) (idiomatic) to let one's hair down === Further reading === “echar alguien una cana al aire”, in Diccionario de la lengua española [Dictionary of the Spanish Language] (in Spanish), online version 23.8.1, Royal Spanish Academy [Spanish: Real Academia Española], 15 December 2025