Bilk \Bilk\, v. t. [imp. & p. p. {Bilked}; p. pr. & vb. n.
{Bilking}.] [Origin unknown. Cf. {Balk}.]
To frustrate or disappoint; to deceive or defraud, by
nonfulfillment of engagement; to leave in the lurch; to give
the slip to; as, to bilk a creditor. --Thackeray.
[1913 Webster]