The phrase comes from Portuguese, where oie is an informal hello, and the clip is associated by players with Goose Goose Duck, the social deduction game where quick voice chat moments often become running jokes. Its existing description frames it as a greeting from the gurila, and that lobby context explains how such a short line spreads between friends, clips and soundboards. Because it needs no setup, people reuse it outside the game as a standalone greeting sound, especially in casual gaming and chat communities.