Top definition
Taking a number 2 and a number 1 at the same time while in the bathroom, thus 21 - the perfect bathroom blackjack.
After 2 hours of being on the road, Lyndon had to take a shit and piss so badly, that he blackjacked as soon as he got in the bathroom.
by Poncho23 March 05, 2016
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2
A word applied for weed measurements. A blackjack is ¾ oz. (21g).

The word "blackjack" is derived from the popular gambling game, which is often called "21".
- Hey pal, I'd like to buy a blackjack.
- Ight, it'll be 100$.

I smoked that blackjack all by myself!!
by Poulin La-Terreur September 19, 2011
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3
a small, light club used for knocking people out
by The Wraith November 05, 2003
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4
a fan of the k-pop group 2ne1.

in the card game, blackjack equals 21 which not only is pronounced the same as the group's name, but also signifies a win. therefore, the fans are referred to as blackjacks.
person 1: Do you like 2ne1?

person 2: Hell yeah I'm a total BlackJack!
by omgitsshelbyy December 03, 2010
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5
1. Noun: A sex position in which a man defecates on a woman's face whilst performing a "reverse 69."
2. Verb: The act of defecating on a woman's face whilst performing a "reverse 69". In preparation, the man usually drinks a pint of laxative, and then, whilst positioning his penis for insertion into the woman's mouth, instead releases a flood of watery diarrhea into her open mouth and upon her face.
1. Girl, "My boyfriend gave me a blackjack last night."
Friend, "Really? How was it?"
Girl, "Not bad, but I got some corn in my eye."

2. Frat Guy 1, "Hey Bra, remember that time that I totally blackjacked you? That was awesome."
Frat Guy 1, "Yeah Bro! That shit ruled!"
by Captain Hot Pocket October 25, 2008
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6
A card game where you basically try to beat the dealer by getting as close to a total of 21 as possible without going over. A picture card and an Ace counts as 21, or Blackjack. This is one of the best games to play when you are in a casino given the low winning advantage of the house.
If the tourists spent more time playing Blackjack, Poker, and Craps, and less time playing the slots, the casinos would be making a whole lot less money.
by AYB October 26, 2003
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7
A complex sexual procedure that involves 21 men and 1 woman. It goes as follows:
2 cocks in the ass
2 cocks in the pussy
2 cocks between the titties
2 cocks in the mouth
1 cock in each ear
1 cock in each eye socket
1 cock in each nostril
1 cock in each hand
1 cock in each foot
1 cock in each armpit
and finally...1 cock in the navel(belly button)
Count em all up...and thats 21 cocks. Blackjack is probabaly physically impossible, but its worth a try if you and your 20 buddies are bored one day and wanna try it out on some sick twisted bitch.
Sophie gathered 21 guys and recorded the first successful blackjack in history!
by Nilknarf Den January 17, 2006
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