Webster's Revised Unabridged Dictionary · 1913

Backhanded

Backhanded , adjective

1.
With the hand turned backward; as, a backhanded blow.
2.
Indirect; awkward; insincere; sarcastic; as, a backhanded compliment.
3.
Turned back, or inclining to the left; as, backhanded letters.

backhanded , adjective and adverb

(Sport) Stroked with a backhand{2}; as, a backhanded drive.