Otherworldly, extraterrestrial and eccentric combined. A combination of cool and cool. Stellar. Groovy and pleasing; both aesthetically and mentally, and in the heart.
Brian, you're so extretessestric, your blue hair is cool.
Her reaction that the plane was going to be 20 minutes late was extrastic. It was only a 20 minute delay, but she started screaming at the flight attendant that the airline needs to refund her ticket for poor performance.