noun

• (US, technical) In textile inspections, a rough or coarse defect in the woven fabric.
• (UK, Ireland, colloquial) A cigarette.
  "He′d Phase Out Fag Industry Los Angeles (UPI) - A UCLA professor has called for the phasing out of the cigarette industry by converting tobacco acres to other crops."
• (UK, Ireland, obsolete, colloquial) The worst part or end of a thing.
  "Fag, s. the worst part or end of anything."

noun

• (UK, Ireland, colloquial, now rare) A chore: an arduous and tiresome task.
  "We are sadly off in the country; not but what we have very good shops in Salisbury, but it is so far to go—eight miles is a long way; Mr. Allen says it is nine, measured nine; but I am sure it cannot be more than eight; and it is such a fag—I come back tired to death."
• (UK, Ireland, education, historical, colloquial) A younger student acting as a servant for senior students.
  "I had the character at ſchool of being the very beſt fag that ever came into it."

verb

• (transitive, colloquial, used mainly in passive form, now rare) To make exhausted, tired out.
• (intransitive, colloquial, now rare) To droop; to tire.
  "a. 1829, G. Mackenzie, Lives, quoted in 1829, "Fag", entry in The London Encyclopaedia: Or, Universal Dictionary, Volume 9, page 12, Creighton with-held his force 'till the Italian began to fag, and then brought him to the ground."
• (intransitive, UK, Ireland, education, historical, colloquial) (of a younger student) To act as a servant for senior students in many British boarding schools.
• (transitive, UK, Ireland, education, historical, colloquial) To have (a younger student) act as a servant in this way.
  "It is everywhere observed that a liberated slave is apt to make a merciless master, and that boys who have been cruelly fagged at school are cruel faggers."

noun

• (US, Canada, vulgar, usually offensive, sometimes endearing) A homosexual man, especially (usually derogatory) an effeminate or unusual one.
  "1921 John Lind, The Female Impersonators (Historical Documentation of American Slang v. 1, A-G, edited by Jonathan E. Lighter (New York: Random House, 1994) page 716. Androgynes known as “fairies,” “fags,” or “brownies.”"
• (US, vulgar, derogatory, offensive) An annoying person.
  "Why did you do that, you fag?"