Green’s Dictionary of Slang

1. excrement, a piece of excrement; also used fig.

1793		J.B. Moreton West India Customs and Manners 131: Wind him so! Work him so! Hold him so! Jig him so! Kackkaw foa you!
1888–94		‘Walter’ My Secret Life (1966) IV 782: I want to do caca.
1965		Guild Dict. Homosexual Terms 26: kaka (n.): Feces. (Rare.).
1972		B. Rodgers Queens’ Vernacular 84: excretion. [...] kaka.
1978		A. Maupin Tales of the City (1984) 82: The moon’s in ca-ca.
1983		S. King Christine 52: ‘My mother says that car is poopy.’ ‘That’s right,’ the little girl chimed in. ‘Poopy-kaka’. [Ibid.] 547: ‘Kaka sucker,’ he said. ‘What?’ He grinned. ‘Twenty-thousand-gallon capacity,’ he said [...] Petunia was essentially a tanker, no more and no less. Her job was pumping out septic systems.
1985		P. Auster City of Glass (1988) 16: The caca piles. The pipi lakes.
1994		G. Indiana Rent Boy 76: Never mind all the other wiggy viruses and microbes that stick around in your ca-ca.
1997		Mad mag. Mar. 49: Without Friends [...] you’d be in deep ca-ca.
2000		P. Beatty Tuff 43: I got a plan to get my shit together. Put all my caca in one big pile.
2002		A. Duff Jake’s Long Shadow 165: Wally smashed in a young boy’s skull as he slept, then did kaka in his poor victim’s bedroom before fleeing.
c.2003		D. Vrij ‘Tying Off’ on Inter-zone.org 🌐 Balloons were nostalgic for him, as they were standard issue back in the day. In the late 60’s early 70’s their appeal lay in their swallowability street dealers could carry them in their mouths, a quick swallow might keep you out of jail, or failing that say in the case of having warrents, having come down sufficiently to take a dump, caca would yield treasure.
2023		R. Milward Man-Eating Typewriter 119: [L]istlessly sucking caca-sized cigars.

2. (US drugs) heroin; esp. when inferior, bogus or adulterated [shit n. (5a)].

1967		P. Thomas Down These Mean Streets (1970) 202: Everybody was buying and nobody was selling except the gyps, and they were mixing milk-sugar with quinine and selling this ca-ca for the real thing.
1971		E.E. Landy Underground Dict. (1972).
2001		ONDCP Street Terms 5: Caca — Heroin.

3. (US) nonsense, rubbish [shit n. (4a)].

1967		(con. 1950s) McAleer & Dickson Unit Pride (1981) 232: Cut the ca-ca, Daigle. Toss the dice.
1972		B. Rodgers Queens’ Vernacular 120: kaka [...] 2. back talk, guff, wisecracks ‘I don’t take no kaka from Lily Law, honey!’.
1997–2002		Hope College ‘Dict. of New Terms’ 🌐 ca-ca adj. Gross. Used to describe fruits and vegetables.
2003		A.N. LeBlanc Random Family 301: Your father’s full of ca-ca.
2023		R. Milward Man-Eating Typewriter 41: [M]y Old Woman insisted it was laudanum that made the nun fade [...] I believe this now to be caca [ibid.] 229: ‘I just clattered this caca [i.e. clothes] up for fun. Ridiculou sea-queen drag’.

4. an act of defecation.

2023

R. Milward Man-Eating Typewriter 37: [S]truggling to enjoy a relaxing lag or caca.