Green’s Dictionary of Slang

1. (UK Und.) a prostitute, esp. one working as a confidence trickster.

1590		Greene Neuer Too Late in Grosart Works (1881–3) 26: As soone as Diomede begins to court, shee like Venetian traffique is for his penny.
1592		Greene Disputation Betweene a Hee and a Shee Conny-Catcher (1923) 9: A disputation between Laurence a Foist and faire Nan a Traffique.
1608		Dekker Belman of London (3rd) H1: The whore is then called the Traffick.
1610		Jonson Alchemist II iii: Why, he’s the most authentic dealer / I’ these commodities! The Superintendent / To all the quainter traffickers, in town.
1723		C. Walker Authentick Memoirs of Sally Salisbury 46: She was complaining of her Ill-Luck to a Fair-fellow Trafficker in Iniquity.
1772		G. Stevens ‘A Lesson of Love’ in Songs Comic and Satyrical 245: Ye Busy in traffick [...] Can estimate justly all worth – but your Wives; / While th’ Interests of Trade you so anxious improve / You neglect their demands and are bankrupts to Love.
1909		J. Washburn Und. Sewer 65: The Cribs in Limelight. Income of Thousands for the Owner — The He-Landlady and His Friends Interested in Promotion of the Traffic.

2. (US prison) a male homosexual (poss. a prostitute).

1931–4

D. Clemmer Prison Community (1940) 336/1: traffic, n. A man or boy invert.