sledging  
noun [ U ] UK uk/ˈsledʒ.ɪŋ/ us/ˈsledʒ.ɪŋ/
  (TRAVELLING BY SLEDGE)     
  (US sledding)滑雪撬 
the activity of travelling on the snow on a sledge
   (INSULTING)     
 informal(体育比赛中为激怒对手而进行的)侮辱 
the act of one sports player insulting another during a game, in order to make them angry