The Ambien Walrus is a character created by webcomic artist Drew Fairweather of Toothpaste for Dinner, symbolizing the bizarre side effects of the sedative Ambien. Legend has it that if you take the pill but stay awake, the walrus appears to convince you to perform nonsensical tasks, like online shopping for useless items or calling your ex. It became a cultural touchstone for the 'Ambien blackout' phenomenon, where users wake up to find evidence of strange behavior they don't recall. The meme is widely used to humorously explain questionable decisions and the chaotic energy of sleep-deprived logic.