Que mentira is a common Spanish phrase that translates as what a lie, and as a short audio clip it has travelled widely through meme pages and short-form video, where a single sceptical line can carry a whole joke. Creators use it to puncture tall tales, fake news-style claims and overconfident boasts without needing any explanation, because the tone alone signals disbelief. Its brevity makes it easy to reuse across languages too, with viewers recognising the reaction even if they do not speak Spanish, which helps explain its staying power in reaction edits.