The phrase "slap wrist" means to rebuke, punish or discipline someone for doing something wrong or breaking a rule. The antonym for slap wrist would be praise, reward, commendation, or recognition. When someone does something good or exceeds expectations, they deserve to be recognized for their efforts and rewarded accordingly. Praising someone can motivate and encourage them to continue doing their best, whereas punishment or rebuke could have a negative impact on their self-esteem and discourage them from making future efforts. Therefore, it's important to acknowledge the good and appreciate people's efforts while dealing sternly with the rule-breakers or wrongdoers in a constructive and positive manner.