The Nerd Pac-Man meme features a stylized version of the classic video game character, typically depicted with thick-rimmed 'nerd' glasses and a smug expression. It serves as a visual representation of the nerd face emoji, specifically used to mock people who provide unsolicited corrections or over-explain simple concepts. The meme gained traction in gaming communities and on social media as a way to satirize pedantry, especially regarding retro gaming lore or technicalities. It captures the essence of the 'Umm, actually' trope, turning the beloved yellow protagonist into a gatekeeping intellectual who thrives on being technically correct.