Green’s Dictionary of Slang

heartburn n.

[its effects]

a bad cigar.

1889–90		Barrère & Leland Dict. of Sl., Jargon and Cant.
1890–1904		Farmer & Henley Sl. and Its Analogues.
1937–84		Partridge DSUE (1984) 542: ca. 1870–1925.