Little wise one. Shannon is the is the tits. She is the mystic of the group going from grounded wisdom to cloudy phylosophy. Ranging from the flaws of academia to lunar looniness.
It is a description of any lady who is intelligent and beautiful and probably sexy but is kind of lazy like a sloth. The lady must also not be athletic as a Shannon is a person is who will want to excercise but have restrictions ( laziness )
Example 1:
Johnston: Wow that girl is so smart and beautiful!
Willy: Yeah she must be a Shannon
Johnston: Yes I agree she is very Shannon
Example 2:
Joewy: Wow that Shannon is so bad ass I wanna be Shannon Shannon
Sarah: A bad ass Shannon Shannon is a bad ass bad ass Shannon Shannon