quemarse las cejas

== Spanish == === Etymology === Literally, “burn one's eyebrows”. === Verb === quemarse las cejas (first-person singular present me quemo las cejas, first-person singular preterite me quemé las cejas, past participle quemado las cejas) (idiomatic) to burn the midnight oil === Further reading === “quemarse alguien las cejas”, 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