no decir ni pío

== Spanish == === Etymology === Literally, “to not say 'chirp'”. === Verb === no decir ni pío (first-person singular present no digo ni pío, first-person singular preterite no dije ni pío, past participle no dicho ni pío) (idiomatic) to keep mum; to not breathe a word; to not say a word; to not breathe a word Synonym: no decir ni mu ==== Related terms ====