noun.
A man given to lewdness; one who is grossly unchaste; a habitual libertine.
To practise lewdness; indulge in lust.
the GNU version of the Collaborative International Dictionary of English
noun.
A man given to lewdness; one addicted, in an excessive degree, to the indulgence of sexual desire, or to illicit sexual relations with women; also called letch and lech.