All 4 Uses

heathen
in
Nation, by Terry Pratchett
(Auto-generated)

"Are you a heathen god of some sort?" she asked.†
Chpt 9. *

heathen = someone who is not civilized or not moral OR an offensive term for a person who does not believe in a preferred religion
"Er, I apologize for calling you heathen," she added.†
Chpt 9.
"Not heathen ones," said Foxlip, "and the bad luck was all his, eh?"†
Chpt 11.
Catch me speaking their heathen lingo!†
Chpt 13.

Definitions:

(1) (heathen)
an often offensive (sometimes humorous) word for someone seen as uncivilized or immoral, especially because she does not share the speaker’s religion or comes from a culture unfamiliar with it

This word is usually judgmental or insulting, so today it is used mostly in joking contexts or when describing older attitudes.
(2) (meaning too rare to warrant focus)
More rarely, heathen can refer to a person who lacks culture or good taste.