leering (Adjective) — Showing sly or knowing malice in a glance. ex. "she had run in fear of...his evil leering eye"
leering (Adjective) — (of a glance) sidelong and slyly lascivious. ex. "leering pharmacy cowboys"
leering (Verb) — Look suggestively or obliquely; look or gaze with a sly, immodest, or malign expression. ex. "The men leered at the young women on the beach"