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English definition of “fag”

fag

noun uk   /fæɡ/ us  

fag noun (CIGARETTE)

[C] UK slang a cigarette: a packet of fags She's gone outside for a quick fag. There were fag ends all over the floor.Tobacco and smoking

fag noun (GAY MAN)

[C] US slang an offensive word for a gay manRelating to sexual preference

fag noun (TROUBLE)

be a fag mainly UK informal to be boring and tiring to do: It's such a fag to have to make your bed every morning.Inconvenience

fag noun (YOUNG BOY)

[C] UK old-fashioned (at some large British private schools) a younger boy who has to do jobs for an older boySchools in general

fag

verb [I] uk   /fæɡ/ (-gg-) UK old-fashioned us  
If a younger boy fags for an older boy at a British private school, he does jobs for him.Helping and co-operating
(Definition of fag from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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