The line comes from Choque de Cultura, the Brazilian YouTube comedy series by TV Quase in which van drivers Rogerinho, Maurílio, Renan and Julinho argue about movies and series in exaggerated slang. Fans clipped its most quotable insults, and 'ô boquinha frouxa' became a standalone taunt for blabbermouths, spreading through Brazilian meme pages, WhatsApp sticker-like audios and soundboard sites. Because the show's aggressive banter is widely imitated, the short phrase works even for viewers who have never watched an episode, surviving as a quick verbal jab at anyone who talks too much.