Jizz is cum and cum is uh... ejaculation. Basically it's the white stuff that comes out of the penis/dick.
In Junjou Romantica, it's the liquidy stuff dripping down the hand if you read the manga and it's the thing that Usagi licks.

©A P -Jizz
by beemyanon October 16, 2014
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Jizz is a nickname for some kind of mayo that girls like to eat.
Hey I can't eat my sandwich without a good jizz.
by Mee Goreng July 21, 2008
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an intimate feeling when it goes kaboom and splats all over the place
I JIZZED ALL OVER YOUR MOM AND NOW SHES ALL STICKY!!!!
by oh jizz no! April 4, 2009
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to ejaculate sperm, popularized in the song "jizz in my pants"
hot girl: o fuck, fuck!
you: a shit i gotta pull it out, im gonna jizz!
hot girl: ok
you: AAAAHHHHHHHHAAAH * cums on her face
by I HAVE A WENIS!!! March 14, 2011
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