Definition of backhands:
(n) :
(tennis and other, racquet sports) A stroke made across the chest from the off-hand side to the racquet hand side; a stroke during which the back of the hand faces the shot.
(n) :
(Ultimate Frisbee) The standard throw; a throw during which the disc begins on the off-hand side and travels across the chest to be released from the opposite side.
(v) :
To execute a backhand stroke or throw.
(v) :
To slap with the back of one's hand.
(n) :
The back of the hand: the reverse side (dorsal side) of the human hand or other primate hand.
(n) :
(surfing) The hand towards the back of the board.