The phrase comes from everyday Colombian Spanish slang that spread through voice notes, short videos, and meme edits rather than a single famous release. Estamos melos signals that everything is sorted and everyone is feeling good, and sisas adds an emphatic, casual yes. Online, the looped delivery turned a normal reply into a reusable reaction, shared when plans work out or a situation stays relaxed. Its popularity rests on that local slang flavor and the rhythm of the repeat, which makes it instantly recognizable even outside Colombia.