Hmm.. Do you go to South Park Elementary?
Speaking as an English person, I have never heard the phrase Blowing a fag used..Smoking a fag or Having a fag are in frequent use - as in the UK a fag is universally understood to be a cigarette. The colloquial (and usually derogatory) term for a gay person is generally poof, queer, fairy, queen, or one of many other (more offensive) slang terms. As the old song goes; "You say Tomato.." | 
