Definition of skulks:
(v) :
To move in a stealthy or furtive way; to come or go while trying to avoid detection.
(n) :
The act of moving in a stealthy or furtive way.
(v) :
To stay where one cannot be seen, conceal oneself (often in a cowardly way or with the intent of doing harm).
(n) :
The act of avoiding an obligation or responsibility.
(v) :
To avoid an obligation or responsibility.
(n) :
The act of skulking.