The 'Oh, You Haven't Heard?' meme originates from the 2008 Family Guy episode 'I Dream of Jesus.' In the iconic scene, Peter Griffin feigns shock when he realizes his friends are unaware of his favorite song, leading into a relentless and hilarious rendition of 'Surfin' Bird' by The Trashmen. The template typically features Peter's smug, wide-eyed expression of disbelief. It is commonly used as a reaction image to mock someone's lack of niche knowledge or to transition into a predictable joke, capturing that specific moment of condescending excitement before delivering a punchline.