Sharking \Shark"ing\, n. Petty rapine; trick; also, seeking a livelihood by shifts and dishonest devices.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Shark \Shark\, v. i. [imp. & p. p. Sharked; p. pr. & vb. n. Sharking.]

1. To play the petty thief; to practice fraud or trickery; to swindle.

Neither sharks for a cup or a reckoning. --Bp. Earle.

2. To live by shifts and stratagems. --Beau. & Fl.

Source: Webster's Revised Unabridged Dictionary (1913)