1st definition: A person who hates Pluto and/or other dwarf planets.

2nd definition: A person who does not allow Pluto and/or other dwarf planets to be planets.

3rd definition: A person who does excludes Pluto and/or other dwarf planets to astronomy education stuff.
Some plutophobe from Internarional Astronomical Union: Pluto isn't a planet anymore.

Some Pluto Lover: Yes It is you plutophobe!
by AwesomeGRidgewell01 October 14, 2020
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A person characterized by an irrational fear of, or aversion to, or discrimination against wealth or wealthy people.
White trash Arthur: Why them rich folks have all that cash? Why not give it all to the poor folks like me? Let me tell you something Mary Ann we ought to cut them up and take that money!
Mary Ann: Oh my days, Arthur, you're a proper plutophobe.
by Jakov123123132 November 14, 2022
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