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1.
n.- feelings, generally happy and/or romantic, associated with the hot fictional character Jesse de Silva from the Mediator series by Meg Cabot, who has hair the color of a raven's wing, eyes as deep as the ocean, and- uh, nevermind.
Feel the Jesseness.
I'm full of the Jesseness right now. The Jesseness is making me hyper.
I am full of Jesseness after reading the "Mediator".
by The JFCers April 21, 2005
 
2.
It's an energy field created by all the JFCers. It surrounds us and penetrate us and it binds the JFCers together.
"The Jesseness is so with me"
"May the Jesseness be with You"
by CrazyClavie April 27, 2005