leer /lɪə $ lɪr/ BrE AmE verb [intransitive]
[ Date: 1500-1600 ; Origin: Perhaps from leer 'cheek, face' (11-19 centuries) , from Old English hleor ]
to look at someone in an unpleasant way that shows that you think they are sexually attractive
leer at
She was sick of old men leering at her.
—leer noun [countable]