To be constantly moving your head left and right so that you do not miss anything approaching you from a blind spot
Mandy had her head on a swivel as she rode her bicycle in downtown traffic in order to avoid getting hit by a car.
by Chow-bi July 5, 2017
Get the head on a swivelmug. by TexasMadeCuzzo December 7, 2016
Get the keep your head on a swivelmug.