The 'Back In The Day, Me And You Baby / That's Not My Son' meme is a popular format that plays on themes of nostalgia suddenly interrupted by a shocking realization. The meme typically starts with a sentimental look back at a couple's past, followed by a sharp comedic turn upon seeing a child that looks entirely different from the father. This template became a viral sensation on social media platforms like TikTok, where creators use it to mock character inconsistencies in movies or to deliver punchlines about suspected infidelity and visual mismatches. It captures the essence of a 'record scratch' moment, making it a versatile tool for storytelling and irony in internet culture.