"Doctrine" is one of them. It's a perfectly good bible word.
Another is "religion." It's not uncommon to hear, "Christianity isn't a religion, it's a relationship." Then they'll talk about hating organized "religion."
But religion is a good old new testament word from James: "Pure religion and undefiled before God and the Father is this, to visit widows and orphans in their affliction and to keep oneself unspotted from the world."
I think what they're meaning to say is something about organized phoniness. With the word "doctrine," I think they mean "legalistic bondage."
SLB, is that what you're trying to say?
Or human contrivances, like, "we don't teach no doctrine, just 'Jesus Saves'" J.P. Moreland talks about the "Menace of Mindless Christianity." This sounds a little like that.
Thanks!