1"to look upon with a bad eye" and variants: to take a dim view of; to look askance at or disapprove of.
2informal A gaze or stare superstitiously believed to cause harm; the magical ability to cause harm in this way. Compare "evil eye". Now chiefly Caribbean.
3A harsh or unkind expression of the eyes, suggesting a malevolent disposition. Also (frequently in plural): a threatening or warning glance.
Early 17th century; earliest use found in John Reynolds. From bad + eye, after French mauvais oeil.