As a noun bilker
is a cheat, especially one who evades payment.
As a verb bilked is
A cheat, especially one who evades payment
(cribbage) The spoiling of someone's score in the crib.
(obsolete) A deception, a hoax.
To spoil the score of (someone) in cribbage.
To do someone out of their due; to deceive or defraud, to cheat (someone).
*2011 , (Steven Pinker), The Better Angels of Our Nature , Penguin 2012, p. 615:
*:They also perpetrate nonviolent crimes like bilking elderly couples out of their life savings and running a business with ruthless disregard for the welfare of the workforce or stakeholders.