The 'Cuteness Overload' meme is an internet staple used to describe the overwhelming sensation of joy one feels when encountering something exceptionally adorable. Often associated with 'kawaii' culture or high-energy reactions like 'puking rainbows,' this trope became popular on image boards and social media in the late 2000s. It typically features characters with dilated pupils, blushing cheeks, or literal hearts for eyes. Users deploy this template to react to everything from baby animals to wholesome relationship milestones, serving as a universal shorthand for emotional vulnerability triggered by pure, unadulterated cuteness.