work someone over 
phrasal verb with work verb uk/wɜːk/ us/wɝːk/
  slang      
 殴打,打伤(某人)
to attack and injure someone
  Do you want me to get some of the lads to work him over? 你要不要我找几个小伙子揍他一顿? 
 Somebody had worked him over pretty good. 有人把他好好地打了一顿。