Underhand

Webster's Dictionary of the English Language

·adj Secret; clandestine; hence, mean; unfair; fraudulent.

II. Underhand ·adv In an underhand manner;

— said of pitching or bowling.

III. Underhand ·adv By secret means; in a clandestine manner; hence, by fraud; unfairly.

IV. Underhand ·adj Done, as pitching, with the hand lower than the shoulder, or, as bowling, with the hand lower than elbow.