Green’s Dictionary of Slang

an act of breaking wind audibly; occas. also a similar sound emitted from the vagina during intercourse.

1709		N. Ward Compleat and Humorous Account of Remarkable Clubs (1756) 33: He faces them with his Arse, and returns their Compliment with such a succession of Trumps.
1772		Bridges Burlesque Homer (3rd edn) 235: It made his wind behind cry trump.
1797		Bridges Burlesque Homer (4th edn) II 306: Some foul air within her rump / Came puffing with a thund’ring trump.
1837		‘Stinking Breath’ in Ticklish Minstrel 44: His wife [...] kept letting dumb trumps, which kept up a great stink.