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Someone who is a billionaire (net worth over a billion dollars), but whose monetary collection consists entirely of pennies (or other coins).
Scrooge McDuck is a pillionaire.
by Cool ET December 15, 2005
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One who has the ability to surpass a billionaire a trillion and zillionaire...Pillionaire keeps piling it up but one will never see it cause its secured in the mind of a 🅿 #DaTrueth
My daddy is a pillionaire we just piling it up baby girl you better choose a winner #DaTrueth
by DaTrueth July 28, 2018
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