Top Definition
A portmanteau of "Jonah" + onanism, invented to describe the mental masturbation of conservative columnist & author Jonah Goldberg. "Jonanism" is defined as the ultimate or highest form of wankery. Coined by internet commenter "calling all toasters" in early 2008.
"Man, did you see Goldberg's newest book where he claims that liberals are the real fascists? It's several hundred pages of sheer unadulterated Jonanism."
by JennOfArk July 19, 2008

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