Green’s Dictionary of Slang

kenchlin n.

(UK Und.) a firm promise.

c.1850

Duncombe New and Improved Flash Dict.

In compounds

kenchlinnigger (n.)

(UK Und.) an untrustworthy villain.

c.1850

Duncombe New and Improved Flash Dict. n.p.: Kenchlinnigger a knave: a mean paltry thief, in whose word or promise his associates in crime can place no confidence.