1Scottish A game in which a lighted stick, piece of paper, etc., is passed around a circle of players until the flame goes out, the loser being the player holding it when this occurs. Also as interjection: said by each player when he or she receives the lighted stick, piece of paper, etc., meaning that the flame is still burning.
2The number five.
3Five pounds; a five-pound note. Compare "Jack", "jacks".
Early 19th century; earliest use found in Blackwood's Magazine. From Jack + 's, shortened form of is, 3rd person singular present indicative of be + alive.