BLACKJACK

blackjack, twenty-one, vingt-et-un

(noun) a gambling game using cards; the object is to hold cards having a higher count than those dealt to the banker up to but not exceeding 21

blackjack, cosh, sap

(noun) a piece of metal covered by leather with a flexible handle; used for hitting people

blackmail, blackjack, pressure

(verb) exert pressure on someone through threats

Source: WordNet® 3.1

Etymology

Noun

blackjack (countable and uncountable, plural blackjacks)

(card games) A common gambling card game in casinos, where the object is to get as close to 21 without going over.

(card games) A hand in the game of blackjack consisting of a face card and an ace.

The flag (i.e, a jack) traditionally flown by pirate ships; popularly thought to be a white skull and crossed bones on a black field (the Jolly Roger).

(weapons) A small, flat, blunt, usually leather-covered weapon loaded with heavy material such as lead or ball bearings, intended to inflict a blow to the head that renders the victim unconscious with diminished risk of lasting cranial trauma.

Coordinate terms: baton, cosh, sap

Any of several species of weed of genus Bidens, such as Bidens pilosa, in the family Compositae.

A blackjack oak.

Verb

blackjack (third-person singular simple present blackjacks, present participle blackjacking, simple past and past participle blackjacked)

To strike with a blackjack or similar weapon.