Green’s Dictionary of Slang

1. a small noisy dog.

1893		Augustus Thomas In Mizzoura [play] 477: Ain’t you got some soup-meat or sumpthin’ you kin spare that little ki-yoodle?
1908		T.A. Dorgan in Zwilling TAD Lex. (1993) 53: A foolish kyoodle named bunk / Whose eyesight was wretchedly punk! / Attempted to chat! With a black and white cat / And found that the cat was / A ——.
1918		‘A-No. 1’ Mother of the Hoboes 57: The ‘fivers,’ the aristocrats of the kiyoodles.
1920		Capt. Billy’s Whiz Bang Aug. 25: [She] was even as Congress controlling the trusts to a terrier kyoodle with a turpentine enema.
1922–24		O.O. McIntyre White Light Nights 39: ‘Buttons’ from the fashionable hotels air the prize-winning kiyoodles.
1923		O.O. McIntyre ‘New York Day by Day’ 9 May [synd. col.] A celebrated dancer with six mop-hound kiyoodles on the same leash.
1960		I. Freeman Out of the Burning (1961) 28: We had no money for treatment for a kiyoodle.

2. a person, usu. derog.

1898		Salt Lake Herald (UT) 6 Nov. 12/5: B’jinks, the same bullet had winged every mother’s kiyoodle ov us.
1903		Ade People You Know 109: A bunch of Kioodles who [...] talked nothing but Piffle.
1913		F.K. Sechrist ‘The Psych. of Unconventional Lang.’ Pedagogical Seminary Dec. n.p.: Slang [...] knows how [...] to work the poppycock racket on any daffy squirt or dotty chucklehead or dippy mushhead, or any crazy kioodle or concatenated chump [W&F].

3. worthless talk.

1910		El Paso Herald (TX) 15 Dec. 4/2: The beefy sports of Europe are coming to these shores, and soon their loud ki-yoodles will fill all out of doors.
1914		Mahoning Dispatch (Mahoning Co., OH) 19 June 7/4: For proof most convincing / it cares no kiyoodle.
1922		S. Lewis Babbitt (1974) 83: I guess the folks in this man’s town will quit listening to all this kyoodling from behind the fence.