Green’s Dictionary of Slang

active citizens n.

[play on SE]

lice, fleas.

[UK]Lex. Balatronicum.
[UK]‘Jon Bee’ Dict. of the Turf, the Ring, the Chase, etc.
[UK]Swell’s Night Guide 107/2: Active citizen, a louse.
[US]Matsell Vocabulum.
[US]Trumble Sl. Dict. (1890).