The Squidward Window meme originates from the SpongeBob SquarePants episode 'That Squeaky Boots,' which first aired in 1999. The image depicts Squidward Tentacles looking through his window blinds with a melancholic expression while SpongeBob and Patrick play outside. It has evolved into the internet's go-to visual for FOMO (Fear Of Missing Out) or feeling excluded from a fun activity. The meme's longevity stems from its high relatability, perfectly capturing the universal experience of being stuck indoors or at work while everyone else seems to be having the time of their lives.