Definition of swivel:
(n) :
(
Mechanical): A piece, as a ring or hook, attached to another piece by a pin, in such a manner as to permit rotation about the pin as an axis; a small piece of ordenance, turning on a point or swivel; -- called also swivel gun. --
w:Wilhelm
"bob ain't got no swivel."
(v) :
to swing or turn, as on a pin or pivot