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(noun)-a person who believes he/she is the center of the universe

See also: cockbunny
My girlfriend is a solipsist.
by The Morning Star December 16, 2005
a person who straddles two lanes while driving or two spaces while parking his / her car; also, a person who uses the last of the toilet paper and doesn't replace it with a new roll
What kind of solipsist parks his car perpendicular to the lines, taking up three spaces?
by Bertrand Russell's brother May 09, 2011