Leer, v. i. [imp. & p. p.Leered (lērd); 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.