opprobrious
Houghton Mifflin
adj.adjective
1.Expressing contemptuous reproach; scornful or abusive.
opprobrious epithets.
2.Bringing disgrace; shameful or infamous.
opprobrious conduct.
A pap refers to a breast in some instances so the distant root might refer to feeding as in feeding the word to those that can not feed themselves, the uneducated.
The term [Fundamentalism] was born when conservative Protestants in early-20th-century America committed themselves to defend the five "fundamentals" of their faith -- the inerrancy of the Bible, virgin birth and deity of Jesus, doctrine of atonement, bodily resurrection of Jesus, and His imminent return.
-- from the thread The many forms of fundamentalism
Fundamentalist: A term created during the turn-of-the-20th-century Protestant church splits to define those who held to the fundamentals of Christianitythe inerrancy of the Bible, the virgin birth of Jesus and his literal resurrection from the dead. The term is now considered pejorative. (Wheaton College philosophy professor Alvin Plantinga famously observed, The full meaning of the term...can be given by something like stupid sumbitch whose theological opinions are considerably to the right of mine.)
-- from the thread New Kids In The Flock