Top Definition
Someone who derives sexual excitement from the natural sciences.
"Yo, have you seen Brian?"
"Ah, man, I just walked in on that jizzicist having waaaay too much fun with his electromagnetism textbook.
by JZCST June 27, 2010
1 more definition
(noun) a person who specializes in giving facials (ejaculating all over a girl's face).
Andrew is a world-renowned jizzicist.
by Andrew B, Jizzicist March 04, 2010

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