Slagger

A lad who only sleeps with slags (because it's easy). In verbal form, said lad is "slagging". Just as a whaler pursues whales, a slagger pursues slags (or more likely just happens to come upon one).

You know that guy Edward? All the girls he's slept with were total slags. He's such a slagger.

by W.C. Lad July 29, 2016