The term 'Jedi Who Lived to be 900' refers to the character Yoda from the Star Wars franchise. Yoda is a small, green-skinned, pointy-eared creature who is one of the most powerful and respected Jedi Masters in the galaxy. He is known for his wisdom and his ability to use the Force. Yoda is over 900 years old and is considered to be one of the oldest living Jedi. He is also known for his unique speech pattern, which often involves inverting his sentences.