What is the meaning of Bilk?

The spoiling of someone's score in the crib.

A deception, a hoax.

A cheat or swindler.

To spoil the score of (someone) in cribbage.

To do someone out of their due; to deceive or defraud, to cheat (someone).

To steal fuel from a self-service filling station by driving away without paying after filling the fuel tank or other container; to commit a drive-off.

To evade, elude.

Source: wiktionary.org