(Striking) Slapping someone on his cheek in a dream means cautioning him or warning him about his heedlessness. If a woman gently slaps her own cheeks in a dream, it means glad tiding of a son she will conceive at an advanced age, or after having lost hope in conceiving children. However, slapping someone’s face in a dream also could mean injustice, an illness, or cold. (Also see Slapping on the cheek)
Read more about dreaming of Slapping in other dream meanings interpretations.