The term 'pagan' is used as a lazy method of describing many things non-christian. What do you think?
Is Christo-centric a word? You know, looking at the world through the Christian perspective. And 'infidel' must mean 'unfaithful' or maybe 'not faithful' to Islam. I'm not sure what 'heathen' means. I really like the way English has so many ways of expressing ideas that are close but not the same. And I think we always have been too lazy to use them properly.
I think current usage is hazy, if not lazy. But @Matias provides, as usual, the historical perspective. Self-described modern pagans in my experience are Wiccans or animists of some stripe or other. Worshippers of nature, basically. The term doesn't carry a negative connotation to me.
Less "lazy" than polemical.
"pagan": late 14c., from Late Latin paganus "pagan," in classical Latin "villager, rustic; civilian, non-combatant" noun use of adjective meaning "of the country, of a village," from pagus "country people; province, rural district," originally "district limited by markers"
Religious sense is often said to derive from conservative rural adherence to the old gods after the Christianization of Roman towns and cities; but the word in this sense predates that period in Church history, and it is more likely derived from the use of paganus in Roman military jargon for "civilian, incompetent soldier," which Christians (Tertullian, c.202; Augustine) picked up with the military imagery of the early Church (such as milites "soldier of Christ," etc.). Applied to modern pantheists and nature-worshippers from 1908.
Pagan and heathen are primarily the same in meaning; but pagan is sometimes distinctively applied to those nations that, although worshiping false gods, are more cultivated, as the Greeks and Romans, and heathen to uncivilized idolaters, as the tribes of Africa. A Mohammedan is not counted a pagan much less a heathen