The phrase comes from Jamaican Patois, where mi no deh is a common everyday way to say I am not here. As a soundboard clip, it spread through short-form video and meme edits as a universal evasion joke, especially in Caribbean diaspora communities online. Its appeal is that the meaning is clear from context even for listeners who do not speak Patois, and the short length makes it easy to loop, layer, or drop into reaction compilations without explanation.