Un x100to is a 2023 regional Mexican song by Grupo Frontera featuring Bad Bunny, built around the image of having only one percent of energy left for a failing love. Its chorus line 'me queda un por ciento' quickly escaped the full track and became a standalone reaction sound on short video platforms. Creators reuse it whenever a character is emotionally drained, ignored or about to give up, because the lyric explains the mood instantly even for viewers who do not know the complete song.