Loud Slap

[SamIAm]

Originally Posted by Snaqwells

Whether the player is dribbling or holding the ball, the defender may slap his hand provided the slap is incidental to an attempt to slap the ball. Dribbling vs holding is irrelevant.
...
A slap on the hand is a slap on the hand, perfectly legal.

A slap on the wrist that doesn't cause any hinderance to the offensive player is incidental contact most of the time. Same as a slap on the arm or leg.

Now, in practice, we may have to get this sometimes in the open court.

paraphrased from NCAA rules -
legal use of the hand(s) includes contact with player's hand while the player's hand is in contact with the ball while player has player control (of the ball)