E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
A person who gives a cabman less than his fare, and, when remonstrated with, gives a false name and address. Sometimes a bilker gets out and says, Cabby, I shall be back in a minute, turns the corner and is no more seen.
The time for taking out a summons expires in seven days, and it often takes longer than that to hunt a bilker down.Nineteenth Century (March, 1893, p. 177).
Also a cabman who does not pay the owner for the cab.