(1):

(v. i.) To act as a fag, or perform menial services or drudgery, for another, as in some English schools.

(2):

(n.) A knot or coarse part in cloth.

(3):

(v. t.) To tire by labor; to exhaust; as, he was almost fagged out.

(4):

(v. i.) To become weary; to tire.

(5):

(v. i.) To labor to wearness; to work hard; to drudge.

(6):

(v. t.) Anything that fatigues.