The 'A Younger Person Wouldn't Understand' meme, often associated with the phrase 'If You Know What This Is, Your Back Probably Hurts,' is a popular nostalgic format used to highlight obsolete technology and cultural touchstones. It typically features items like floppy disks, VHS tapes, or rotary phones to create a humorous divide between generations. While it can be seen as a form of lighthearted gatekeeping, the meme primarily functions as a shared memory for Gen X and Millennials. It gained massive traction on social media as a way to bond over the specific struggles and joys of the pre-smartphone era, turning everyday relics into symbols of a shared past.