The act of glaring at someone with a lot of anger or hatred.

Looking at someone with deep anger, disappointment, or hate.

it's a form of unintentional hipnosis caused by looking intensily at someone with adoration,lust,hatred or envy
it's found in one way or another in every part of the world and it's believed to be true to some degree,in eastern europe in particular it is such a common belief that mothers almost always dress babies with a red ribbon which is thought to be a distraction

to be under an evil spell or to cast one.(black magic)

Glare usually given as a threat by a someone who is not neccessarily evil, but possessed or a demi-devil.
(Arcane) To curse someone with a glare.