Wiktionary
parrot-fashion
adv. In the manner of a parrot; with thoughtless repetition of what others have said.
Usage examples of "parrot-fashion".
But anyone could learn a few sentences like that parrot-fashion in half an hour!
But since in the main their commentaries consisted of monologues learned parrot-fashion over years of flying the same routes, pretty soon the drone of their voices became one with the whirring of rotors and ceased to have meaning.