—n. 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: the slap of the waves against the dock. 3. a sharply worded or sarcastic rebuke or comment.
4. slap on the wrist, relatively mild criticism or censure: He got away with a slap on the wrist.
—v.t. 1. to strike sharply, esp. with the open hand or with something flat.
2. to bring (the hand, something flat, etc.) with a sharp blow against something.
3. to dash or cast forcibly: He slapped the package against the wall. 4. to put or place promptly and sometimes haphazardly (often fol. by on): The officer slapped a ticket on the car. He slapped mustard on the sandwich. 5. slap down, a. to subdue, esp. by a blow or by force; suppress.
b. to reject, oppose, or criticize sharply: to slap down dissenting voices.
—adv. Informal.directly; straight; smack: The tug rammed slap into the side of the freighter.