nonce-wd. The realm of criminals; criminals collectively.
1887. Spectator, 5 Nov., 1515/1. The shameless accumulation of the very dregs of French criminaldom within a day or twos sail of our great Australian Colonies.
1907. Bendigo Independent, 8 June, 3/1. There were sore heads and heavy hearts among Melbournes criminaldom this week when they read how easily £1700 worth of gold was scooped from off the very premises of the Melbourne mint.