When your own shadow follows you and scares you
Shadowbeasting When others use their shadows to chase you down the street. (Consisting of 2 or more chasers)

Created by a group of neighbours /brothers picking on one of their younger siblings, so she ran home crying and couldn't play games with the boys as she was too scared the shadowbeast would come out and get her if she ran across the road.

Someone people turn to when they're sad who makes them feel better.