Another synonym for the plant cannabis sativa, usually to refer to the higher quality.
This term was invented by a small stoner child when said child declared that calling it 'stoned' was silly, because stones were heavy and it made one feel as though one was flying, and therefore should be called 'feathered'.
See also philly walk.
"You gonna share any of those feathers, or do I gotta go buy my own?"
"Did you see that guy on the bus feathing out?"
"Dinner was great, until I got "feathed". I am not sitting next to Bob's sister again."
"Feath came over last night, and was flapping every which way and left feathers all over the ground!"