Green’s Dictionary of Slang

1. (W.I. Rasta) a quarrel or contention.

1950		Bennett, Clarke & Wilson Anancy Stories and Dialect Verse 33: Anancy [...] start fer carry lie an story between dem, an start big kas-kas. [Ibid.] 100: Kas-Kas – quarrel, contention.
1957		F.G. Cassidy ‘Iteration as a Word-forming Device in Jamaican Folk Speech’ in AS XXXII:1 50: kas-kas, contention.
1976		L. Barrett Sun and the Drum 39: In Jamaican kas-kas one may hear a series of proverbs being exchanged either to put down the opponent or to show the social distance between them.
1980		(con. 1950s) M. Thelwell Harder They Come 52: One confusion! One kass-kass!
1986		O. Senior ‘Ballad’ Summer Lightning 132: Jiveman cursing her all kind of name and big kas-kas going on between them.
1999		A. Weller Land of the Golden Clouds 128: Coo’yah, no fight no dey. Kass kass with them Baldies a Babylon.
2000		T. White Catch a Fire 322: Stung, this group found their back o’ yard vexing blossoming into public kass-kass.

2. (W.I., Jam.) malicious rumour-mongering.

1943		L. Bennett ‘Kus-Kus’ in Jam. Humour 15: Dat marga gal Wingy / Want put me eena kus-kus / An big lian story.
1966		L. Bennett ‘Kas-Kas’ in Jamaica Labrish 187: Kas-Kas is the Jamaicanese for the pastime of rumour-mongering leading to accusations and counter accusations.
1991		B. Gloudon Stella Seh 51: So I say, where kass-kass deh. no dere me deh.

3. an argumentative person.

1976

L. Barrett Sun and the Drum 20: A contentious person is known as a kas-kas from the Twi word kasakasa.