Green’s Dictionary of Slang

1. a bailiff and/or his assistants.

c.1698		B.E. Dict. Canting Crew n.p.: Janizaries [...] Bailives, Serjeants, Followers, Yeomen, Setters, and any lewd Gang depending upon others.
1725		New Canting Dict. [as cit. c.1698].
1737, 1759, 1760, 1776		Bailey Universal Etym. Eng. Dict. [as cit. c.1698].
1785, 1788, 1796		Grose Classical Dict. of the Vulgar Tongue.
1811		Lex. Balatronicum.
1823		Egan Grose’s Classical Dict. of the Vulgar Tongue.

2. the mob.

c.1698		B.E. Dict. Canting Crew n.p.: Janizaries [...] also the Mob sometimes so called.
1725		New Canting Dict. [as cit. c.1698].
1737, 1759, 1760, 1776		Bailey Universal Etym. Eng. Dict. [as cit. c.1698].
1785, 1788, 1796		Grose Classical Dict. of the Vulgar Tongue.
1811		Lex. Balatronicum.
1823		Egan Grose’s Classical Dict. of the Vulgar Tongue.
1859		Matsell Vocabulum 46: janazaries A mob of pickpockets.