Ay por Dios is a common Spanish expression meaning oh my God, used in everyday speech to express surprise, disbelief or exasperation. Short voice clips of the phrase circulate online as reaction sounds because the tone is instantly recognisable even to listeners who do not speak Spanish. Creators reuse it in memes, reaction videos and short-form edits to punctuate awkward, dramatic or unbelievable moments, and its brief length makes it easy to drop over a single shot without interrupting the scene.