Wordnet 3.0
VERB (1)
1. 
 give a beating to; 
 subject to a beating, either as a punishment or as an act of aggression; 
- Example: "Thugs beat him up when he walked down the street late at night"- Example: "The teacher used to beat the students"[syn: beat, beat up, work over]
WordNet (r) 3.0 (2006):
work over
    v 1: give a beating to; subject to a beating, either as a
         punishment or as an act of aggression; "Thugs beat him up
         when he walked down the street late at night"; "The teacher
         used to beat the students" [syn: beat, beat up, work
         over]