Simply one of the greatest things to have in ones life. A girl beyond measure, caring, loving, beautiful, unquestionably unique and much much more. As rare as the most precious mineral, but worth millions of times said mineral.
Some-one (often a girl) who is pretty confident, sarcastic and funny with her own gender but is too shy and ultimately fails when trying to communicate or socialize with the opposite sex, especially attractive ones.
"C'mon go talk to that boy. Don't be such a Jeni."