The phrase comes from everyday spoken Dutch, where Ja, dat is 'm is a contracted way of saying yes, that is him or that is the one. No specific film, show or creator is reliably tied to this recording, so its life has been mainly online as a short reaction clip. It circulates on soundboards and in edits among Dutch speaking audiences and meme viewers who understand the shout even without context. Its appeal is the instant, exaggerated certainty, which keeps it useful for reveals, identifications and spot on moments in short videos.