The “Evil Eye” is the Fang Gang’s term for the Mind Gift, which can telepathically make mortals and immortals alike obey a command. In The Queen of the Damned, Killer urges Baby Jenks to use the Evil Eye to coerce her way into a vampire bar.
The term appears in The Queen of the Damned (1988). For more perspectives on the Evil Eye, read the Alphabettery entries Baby Jenks, Davis, Killer, and Mind Gift.