a cigarette

she's got a fag in her mouth, and she's squinting her eyes against the smoke

a gay man

a tiring or unwelcome task

it's too much of a fag to drive all the way there and back again

a junior pupil at a public school who does minor chores for a senior pupil

a fag at school who has suffered a well-earned beating

work hard, especially at a tedious task

he didn't have to fag away in a lab to get the right answer

(of a public-school pupil) do minor chores for a senior pupil

the lower boys in each house fagged for members of the Library