The sound comes from Broxada Sinistra, credited as the artist on the clip titled as a preview of Escolinha do Broxada. Its hook is the phrase bah tchê, a well known expression from Rio Grande do Sul in southern Brazil, used to show surprise or emphasis in everyday speech. Online, the Nargas version was shared as a short soundboard clip, where its loud, stretched delivery made it easy to reuse out of context. It remains popular in Brazilian meme edits because the regional phrase is instantly recognizable and works as a standalone reaction.