Rato Borrachudo began as a Brazilian online comedy persona built around a rat puppet with a distinctive squeaky voice, gaining an audience through gaming videos and short meme clips shared on YouTube and social media. The character became a staple of Brazilian internet humor, with lines and reactions reposted as soundboard clips and WhatsApp audios. Fans use the voice out of context to mark moments as deliberately silly or over the top. Its continued popularity comes from instant recognizability within Portuguese speaking meme communities and the versatility of the reaction.