blackjack

noun11

1. •
   A common gambling card game in casinos, where the object is to get as close to 21 without going over.
2. •
   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.

   • The pain is sometimes like the dull, heavy thud of being hit with a lead-filled blackjack; other times like a wizard is reaching deep below the skin and ripping muscles, tendons, and nerves. — 2016
3. •
   A hand in the game of blackjack consisting of a face card and an ace.
4. •
   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).
5. •
   A variant of switch where each player is initially dealt the same number of cards, usually seven, and when one player plays a black jack the player whose turn comes next has to pick up that many cards, unless they play a red jack (as this normally cancels a black jack).
6. •
   A variant of hearts where the Jack of Spades is the penalty card.
7. •
   Ellipsis of blackjack oak.

   • A steep slope rose, crested by stunted blackjacks. — 1931
8. •
   Any of several species of weed of genus Bidens, such as Bidens pilosa, in the family Compositae.
9. •
   A tool of leather filled with shot (or similar), resembling the weapon, used for shaping sheet metal.
10. •
    Any of a series of hard, dark soils, often considered low quality, but suitable for growing certain crops such as cotton.

    • The predominant soil is the blackjack soil like that of the lower plateaus, seemingly, however, in most cases a little more sandy and a little coarser in grain. — 1911
11. •
    (UK, rare) Ammonium bituminosulfonate.

    • I remember Black Jack very well and actually like the smell. It is no longer available with that trade name but glycerine of ichthammol can still be bought in chemists. — 2010

verb1

1. •
   To strike with a blackjack or similar weapon.

   • “We cannot have you getting blackjacked and bound yet again.” — 2019

noun1

1. •
   (slang) A fan of the South Korean girl group 2NE1.

   • The queens of K-pop, 2NE1, are gearing up for their world tour in March and Blackjacks could not be more excited! — 2014