What exactly is meant by the term "Pagan Witch”?

I call that “marriage material”

A slur towards a non christian who practices witchcraft.

Like motherfucker, it’s a slur impossible to be taken literally, but serious enough. It’s what a Christian male might call a female apostate who has rejected his advances… just before she hands him his nutsack from the point of an athamé.

A slightly redundant term for a practitioner of Wicca?

Seriously, a Pagan Witch is a legitimate and acceptable term for a practitioner of Pagan Witchcraft, aka Wicca, a form of Modern Paganism.

“The basic unit of Wicca is the coven which is often made up of 13 members, but not always. In some covens, the title of “Witch” can be assigned to either gender. Most modern covens are matriarchal.”—Wiccapedia