The Mental Age Test meme stems from the viral nature of online psychological quizzes that purportedly measure a person's maturity level. The meme format typically involves displaying a 'test result' alongside a relatable or absurd scenario that contradicts or confirms the score. It became a staple on platforms like TikTok and Instagram as a way for users to mock their own lack of adulting skills or to point out the irony of their interests. By contrasting a numerical age with actual personality traits, the meme highlights the universal feeling that maturity is often performative and that everyone retains a bit of their childhood self regardless of their actual age.