Hello! I need your help. I don't understand this sentence: She socked him on the shoulder... Can you please explain what she did to him? Here is more context, hope it's sufficient. It's in the historical romance novel based in Regency England. Although they did not speak of it, Margaret knew her young brother was aware of the tension in the house. She did not want him to worry, so she socked him on the shoulder on his way out the door, as any good sister would. (He was leaving home for school and Margaret was saying him goodbye...) Thank you very much. I appreciate your help.