Leer \Leer\, v. i. [imp. & p. p. {Leered} (l[=e]rd); p. pr. &
vb. n. {Leering}.]
To look with a leer; to look askance with a suggestive
expression, as of hatred, contempt, lust, etc.; to cast a
sidelong lustful or malign look.

I will leerupon him as a' comes by. --Shak.

The priest, above his book,
Leering at his neighbor's wife. --Tennyson.