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Autism Creature or Yipee or Yippee refers to an MS Paint drawing of a white, four-legged creature with a large head, neutral expression and big black eyes. A drawing of the creature was first posted to Twitter in January 2021 and became popularized on Tumblr in early 2022, inspiring fan art and memes. The character is sometimes referred to jokingly as the mascot of autism. It is also known as yipee or yippee due to several memes using a "yipee" sound effect along with the creature.