The phrase comes from everyday spoken Chinese, with its distinctive wording associated with Northeastern dialect speech, where a familiar term for mother is used as a general exclamation of surprise. It spread online as a short reaction clip shared in funny videos and edits, rather than from a single film or television scene, and it is now widely recognised by viewers who follow Chinese internet humour. Its appeal lies in its instantly readable emotion, which needs no translation to signal shock, embarrassment or disbelief.