Verb. to pluto someone or something is to downgrade, demote or remove altogether from a prestigious group or list, Like what was done to the planet of the same name.

No longer a planet. It was discovered in the 1930s and in 2006 they finally decide to change everything we learned growing up...im so confused now...

a big ball of methane and nitrogen that was big ballin' as a planet for about 80 years, until the IAU (International Astronomical Union) decided to get all technical and make that little bitch a "dwarf planet." At this point, it's a pretty safe bet that Pluto won't be getting laid anytime soon.

1. somebody who has achieved promotion quickly at work, only for it to be obvious that they cannot live up to the job, and hence experience a humiliating demotion
2. a star -rock\pop etc - who is talked about a lot in the press as though they are the next big thing, but then never deliver the goods.
After the planet - which is no longer a planet!

Verb: To be demoted for no good reason. Origin from the former planet Pluto.

Used to be the ninth planet in our solar system. Now it is categorized as a dwarf planet.

1. one of the planets of our solar system. Ceres and "Xena" are also planets. Anything that is round, orbits a star and is NOT a star itself is a planet, no matter what those cretins in the IAU say.

2. a Disney cartoon dog