The Floss or Flossing (aka the backpack kid dance) is a dance move characterized by standing with your feet shoulder width apart, then swinging your arms side to side across the body and behind the back. When moving arms to the left across the body both arms are in front, when the swing begins to move across the body to the right the left arm swings behind the body while the right arm remains in front. Alternate which arm is behind and which is in front on each swing from left to right. Sometimes hip motion is added to the swinging of the arms.