teetotaller       
noun [ C ] UK (US usually teetotaler) uk/ˌtiːˈtəʊ.təl.ər/ us/ˌtiːˈtoʊ.t̬əl.ɚ/
 绝对戒酒(主义)者
someone who never drinks alcohol
  He himself was a non-smoking teetotaller.  他自己就曾绝对不沾烟酒。 
 See: teetotal
 - More examples
 - I'm not going to pretend I'm a teetotaller. But I don't drink very much.
 - A confirmed teetotaller, he is said to be the driving force behind the campaign against alcoholism.
 - His parents are teetotallers so he didn't get the whisky from his home.
 - He is a teetotaller, does not smoke, goes to bed early and lives modestly.