1. a sharp blow or smack, esp. with the open hand or with something flat. 2. a sound made by or as if by such a blow or smack. 3. a sharp or sarcastic rebuke or comment. slap on the wrist, relatively mild criticism or censure: He got away with a slap on the wrist. 4. to strike sharply, esp. with the open hand or with something flat. More @Wikipedia
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