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1.
jelli is slang for 'Jealous'
OMG im so jelli of him cuz he's got a six-pack and all the wenches on campus.
by jenou April 10, 2007
 
2.
a girl who is 'bare buff ting',beautiful, young and sexy. Only a small minority girls will ever be jellis.
man dat girl is jellis.
by Gaz ting January 16, 2006
 
3.
The act of being completely jealous but attempting to seem nonchalant.
"GUYS my bff has a new cell phone and I DON'T! I need to steal her boyfriend to get her back!"

"Girl, stop being jealous of her."

"I'm NOT jealous! I want her to be happy with her cell phone, but she doesn't deserve a nice phone AND a bf!"

"OMG, jellis!"
by caittails March 16, 2009