The phrase comes from Thai online culture, where soi ju is widely talked about as a bold Isan dish and sahai is a warm word for a comrade or friend. This clip circulated as a PodTalk sound, shared in its short form for quick reactions rather than as a full conversation. Its spread relies on recognition of the dish and the casual, inviting way the line is spoken. It remains in use because the reference is specific, the delivery is short, and Thai audiences can place the joke without any setup or explanation needed.