Hi Noob belongs to a long tradition of gaming slang where noob, short for newbie, labels an inexperienced player. Short greeting clips like this spread through game chats, streams and soundboards because they turn a common insult into a quick, shareable reaction. The x3 style naming suggests repeated or remixed uploads, which is typical for tiny voice memes that get reposted across lobbies and edits. It stays popular because almost every multiplayer community understands the joke instantly, even without knowing which game someone is playing.