Green’s Dictionary of Slang

1. a slattern, a promiscuous woman.

1617		Fletcher Mad Lover I i: How our St. Georges will bestride the dragons, The red and ramping dragons!
1711		N. Ward Vulgus Britannicus XI 129: Whore on like Bullies, drink like Dragons, / Call themselves Whigs, but talk like Pagans.
1815		‘George Barnwell’ in Vocal Mag. 2 Jan. 30: Dear George, don’t engage with that dragon, / She’ll lead you to sorrow and shame.

2. an old prostitute, a bawd.

1859		Wkly Varieties (Boston, MA) 3 Sept. 6/1: Fan Lee, the she-dragon of a lake of lewdness [...] has secured the invaluable services of George Woods as pimp, pander, procurer, protector and principal personage of her pandemonium of pollution, piracy and plunder.
1984		Partridge DSUE (8th edn) 339/1: since ca. 1959.

3. (N.Z.) a wife.

1968

G. Slatter Pagan Game (1969) 207: That’s if his dragon gives him a leave pass, of course.