Source : Webster's Revised Unabridged Dictionary (1913)

Cumshaw \Cum"shaw\ (k?m"sha), n. [Chin. kom-tsie.]
   A present or bonus; -- originally applied to that paid on
   ships which entered the port of Canton. -- S. Wells Williams.

Cumshaw \Cum"shaw\, v. t.
   To give or make a present to.