Green’s Dictionary of Slang

kennick n.

[ken n.1 (1) + ? model of Celtic]

a mixture of criminal cant and the slang talked in a lodging house.

[UK]F.W. Carew Autobiog. of a Gipsey 17: At shortening, sallying, trucking, gladdering – to descend from gentle Romnimus to base-born Kennick.