1. A loner reject planet that the solar system kicked out
2. Mickey Mouse's awesome dog
3. Your mum.
Sarah: I kinda feel sorry for Pluto, you know?
Bianca: What? The planet or the dog or what?
Sarah: the planet, DER.
by YOURMUMRATESME February 21, 2010
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a poor little rock thingy in space that was tricked into thinking it was a planet, when... wham! some mean scientists told it the truth: it was a "dwarf planet" (which is some sick disorder that tiny planets are labeled with). i feel bad for the little guy.
"It's okay, Pluto. I'm not a planet either."- Snorg Tees
by Spyder Gurl August 24, 2008
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to be demoted without due cause or reason
I was captain of the ship for one day, but then I was plutoed.
by DkLdAp December 13, 2006
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when you are so high, your eyes are bright red and you aren’t “on earth” anymore. instead you are “flying highin the clouds
“your eyes are so red you must be zooted

“dude i’m on pluto
by šmïłęh0ę April 2, 2020
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to be demoted of rank just like ex planet pluto

to be lessened in rank
by Veggygirl714 August 21, 2009
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Verb: To be demoted for no good reason. Origin from the former planet Pluto.

The corporal got in trouble with the sargent, therefore, he was plutoed back to private.

by Buddy Man March 16, 2007
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The ninth planet which has been treated badly by the IAU.
Pluto is a planet.
by Ash-Greninja January 8, 2017
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