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!

1. hear about Smithson - last weeks new MD? Got fired, the asshole. He's a real pluto.

2. Pete Doherty is just a total pluto

pluto by chris firth August 24, 2006

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Pluto

A pluto is a person who is small yet everyone cares about them because they're so important and wonderful whether or not they're apart of something.

"You're such a pluto. Next time we'll invite you."

Pluto by khallanal December 26, 2016

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Pluto

A poor little planet that lost its title as planet recently and is now a "dwarf" planet. Pluto is beyond the Kuiper belt and crosses paths with Neptune every something or other years. It and its moon Charon orbit around each other.

Me: Pluto lost its title as planet. I feel bad for it.
Someone else: Its not a living thing so it doesn't matter.
Me: I STILL FEEL BAD FOR IT! FOR FOURTEEN YEARS I'VE BEEN TAUT THAT THERE WERE NINE PLANETS AND NOW THEIR TELLING ME THERE'S ONLY EIGHT! WHAT THE HELL!

Pluto by The Black Mew October 14, 2006

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pluto

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

1. Pluto is a planet, damn it!

2. My mom posed with me and Pluto when we were in Disneyworld in Florida.

pluto by I Saw U2 Live Twice September 23, 2008

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