To look with a leer; to look askance with a suggestive expression, as of hatred, contempt, lust, etc
disapproval If someone leers at you, they smile in an unpleasant way, usually because they are sexually interested in you. Men were standing around, swilling beer and occasionally leering at passing females He looked back at Kenworthy and leered. Leer is also a noun. When I asked the clerk for my room key, he gave it to me with a leer. to look at someone in an unpleasant way that shows that you think they are sexually attractive leer at (Perhaps from leer (11-19 centuries), from hleor)
A distorted expression of the face, or an indirect glance of the eye, conveying a sinister or immodest suggestion
a suggestive or sneering look or grin look suggestively or obliquely; look or gaze with a sly, immodest, or malign expression; "The men leered at the young women on the beach