(1):

(v. i.) To evade an obligation; to avoid the performance of duty, as by running away.

(2):

(n.) One who lives by shifts and tricks; one who avoids the performance of duty or labor.

(3):

(v. i.) To live by shifts and fraud; to shark.

(4):

(v. t.) To procure by petty fraud and trickery; to obtain by mean solicitation.

(5):

(v. t.) To avoid; to escape; to neglect; - implying unfaithfulness or fraud; as, to shirk duty.