The line is the Spanish dub of 'That's all, folks!', the sign-off that has closed Warner Bros. cartoons since the 1930s, when Porky Pig took over from earlier characters like Bosko. Latin American broadcasts of Looney Tunes made '¡Eso es todo, amigos!' the version a whole generation grew up hearing on television. After the original shorts aired, the phrase survived as shorthand for a tidy ending, quoted in dubs, parodies and cartoons for decades. Online it became an outro sting: creators place it at the very end of a video to land the final joke with a nostalgic wink.