The 'Mini Joker' meme is a fan-made, edited variation of Joaquin Phoenix's Arthur Fleck from the 2019 film 'Joker'. By digitally shrinking the character's height while maintaining his proportions, creators turned a dark, gritty cinematic moment into a surreal and adorable internet sensation. It first gained traction on platforms like Reddit and Twitter as a way to represent feelings of minor social embarrassment, 'clownish' behavior, or acting tough despite being harmless. The meme often features the tiny protagonist walking confidently or dancing, capturing the humor of unearned confidence in the face of trivial daily situations.