An adjective meaning cool, freaky, groovy, amazing, or all of the above, depending on the context in which it's used. Although "trippy" is a fairly new word, the root word, "trip," refers to soft psychedelic trips and has been in use since the 60's.
Person 1: "Whoa, dude. Those yellow fractalsin the air are pretty trippy..."
Person 2: "Um, I think you've seriously gotta cut the acid. That's the McDonald's sign."
Charles Trippy is a popular Youtuber on the internet. He films skits for his Charles Trippy channel, but also does daily vlogs for the CTFxC channel. He films in Florida with his fiancee Alli and his two dogs, Zoey and Marley.