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1 definition by jessie_freakgirl

1. Sylvanus
A man, usually with some form of a undiagnosed mental illness, who knows everything there is to know.
Oh my goodness! Did you hear George telling about how to get rich? He is acting like such a sylvanus.
conceited arrogant selfish mean know-it-all
by jessie_freakgirl Feb 8, 2009 add a video
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