Green’s Dictionary of Slang

a talkative, gossipy woman; as v., to repeat, to copy.

1865		Dickens Our Mutual Friend (1994) 360: If it warn’t wasting good sherry wine on you, I’d chuck this at you for poll parroting with this man.
1873		Sl. Dict. 257: Poll parrot a talkative, gossiping woman. A term much used about Ratcliff Highway.
1895		C. Crowe Aus. Sl. Dict. 60: Poll Parrot, a woman tattler.
1914		Mencken letter 2 Aug. in Riggio Dreiser-Mencken Letters I (1986) 147: These reviews merely poll-parrot the earlier ones.
1937		D.L. Sayers Busman’s Honeymoon (1974) 271: I wouldn’t ’ang a dog on ’er evidence. Mangy old poll-parrot!