1. n.1 the card-game pontoon.
2 US a flexible leaded bludgeon.
Etymology: BLACK + JACK(1) 2. n. a pirates' black flag.
Etymology: BLACK + JACK(1) 3. n. a tarred-leather vessel for alcoholic liquor.
Etymology: BLACK + JACK(2)
1. n.1 the card-game pontoon.
2 US a flexible leaded bludgeon.
Etymology: BLACK + JACK(1) 2. n. a pirates' black flag.
Etymology: BLACK + JACK(1) 3. n. a tarred-leather vessel for alcoholic liquor.
Etymology: BLACK + JACK(2)
Oxford English vocab. Оксфордский английский словарь. 2012