Green’s Dictionary of Slang

(W.I.) sexual intercourse; thus do rudeness, to have sex.

1968		A. Salkey Late Emancipation of Jerry Stover (1982) 45: He ain’t nothing to me, and besides, he ain’t getting any rudeness. [Ibid.] 179: Is so I love the rudeness when the weed take effec’, nice bad for true.
1975		E. Brodber Yards in the City of Kingston 41: Since courting cannot take place in the yard but will take place, it must be outside of it. [...] in rural Jamaica, it is ‘taking your rudeness to bush.’.