Green’s Dictionary of Slang

1. a sanitary towel.

1956

cited in Cassidy & LePage Dict. Jam. Eng. (1980).

2. a highly derog. term of abuse; also as an excl.

1983		C. Knight We Shall Not Die 55: What di raas clat yuh expec’ mi to do? Sit on down on mi behin’ and miss a chance to get back from dem bombo claat deh what is rightfully for mi?
1991		L.E. Adams Jam. Patois 49: Bad words, such as bumbo clot, rass clot.
1998		R. Carr Brixton Bwoy 194: ‘Bombo claat!’ Tee thought. ‘How we going to get past dat King Kong of a man?’.
2000		Etienne & Maynard Infiltrators n.p.: His voice, a harsh mix of Birmingham street slang and Jamaican patois, was loaded with aggression. ‘Get back in the car, bumbaclot,’ he screamed.
2004		A. Mansbach ‘Crown Heist’ in Brooklyn Noir 130: ‘Bumbaclot,’ he mumbled.
2004		M. Mordue Dastgah 91: He is calling her a ‘bumbo claat,’ [...] an insult to women derived from some unflattering West Indian slang for menstrual blood.
2017		hubpages.com ‘Roadman Slang 4 Jun. 🌐 Bombaclart/bloodclart- a very rude Jamaican insult.
2022		J. Hannaham Didn’t Nobody Give a Shit 127: She just a shady-ass li'l bumboklaat.

3. attrib. use of sense 2.

1994		M. Montague Dread Culture 92: Unnu tink a big bumbo claat woman like me have time fi play wid unnu lickle rass claat bwoy pickney, eeh?
1997		I. Fulani Seasons of Dust 78: Yu winnin up wid dat bumbo claat bwoy! Yu fukkin hoor yuh !
2015		Alkaline ‘Object Bingo’ 🎵 Me can lick unno bumboclaat chest.

4. a euph. for fuck n. in various senses.

1983		C. Knight We Shall Not Die 65: What di bombo claat unoo tryin’ to do? Kill me?
1993		W.B. Branch Crosswinds 173: What the bumbo cloth you think this is? You is me woman. Leave you mother in bush to rass.
2013		Jamaican Patois Online 6 July 🌐 Wah di bumboclaat wrong wid yu!