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Celestial bodies in orbit around the sun at a distance greater than that of Neptune that have sufficient mass for their self-gravity to overcome rigid body forces so that they assume a hydrostatic equilibrium (near-spherical) shape, and that have not cleared the neighborhood around their orbit.
Person 1: "So what are some plutoids?"
Person 2: " Pluto and Eris are the only known plutoids. Ceres is between Mars and Jupiter, so it is NOT a plutoid."
Person 1: "Whatever. The International Astronomical Union (IAU) is crazy anyway. Who uses this stuff?"
plutoid by Dante's Inferno June 12, 2008
Related Words
"To demote or devalue someone or something, as happened to the former planet Pluto when the General Assembly of the International Astronomical Union decided Pluto no longer met its definition of a planet."

Does not inherently note whether the demotion was with or without cause. This is the definition provided by the American Dialect Society, who coined the word.
The US dollar has plutoed in recent years.
plutoed by RadSavage August 19, 2009

Plutocide 

The systematic elimination of the plutocratic class, usually preceded by hears or decades of abuse and indifference towards the majority of a society's population by the plutocratic class.

The french revolution was one example of plutocide by a long abused public. So was the russian revolution.
I'm beginning to think then only solution to america's problems for most people is going to involve plutocide.
Plutocide by Robespierre! October 17, 2011
to be demoted without due cause or reason
I was captain of the ship for one day, but then I was plutoed.
plutoed by DkLdAp December 17, 2006
to be demoted of rank just like ex planet pluto

to be lessened in rank
Youve been plutoed
Plutoed by Veggygirl714 August 20, 2009

Plutoidal 

adj. Of or relating to having less influence than the main group or object, often on the fringe
Of the examples presented at the seminar, the "Free Thought" exhibit seemed plutoidal, and should be cut from next year's presentation.
Plutoidal by Bonedalian August 10, 2009