The phrase comes from Kenyan Swahili slang, where wajinga means foolish people and buana is a familiar way of addressing a man, similar to mate. It circulates mainly as a short TikTok sound, shared with Kenya-related tags and used by creators responding to claims they find insulting to their intelligence. Its appeal lies in its plain language and cultural specificity, which lets Kenyan viewers recognise it instantly while others pick up the meaning from context. As a reaction clip, it continues to appear in skits, duets and comment replies.