Online, 4 da homies works as a compact tag for friendship content, especially short videos where a group wants to mark itself as a unit before the joke, stunt, or celebration begins. Because the phrase is short and easy to quote, creators reuse it as an opener, a reaction, and a caption-style audio cue across friend-group edits, gaming clips, and celebration posts. Its staying power comes from that flexibility: it fits almost any moment built around loyalty, inside jokes, and shared success, without needing a longer explanation.