Jack's are beautiful guys, inside and out! Usually tall with blonde hair that you want to run your fingers through, and their eyes, don't even get me started! The most beautiful blue eyes that sparkle when they laugh. If you happen to be friends with a Jack, I'm so sorry, cause chances are you have a MASSIVE crush on him. He is the full package and he doesn't even know it, and if you somehow manage to get into a relationship with a Jack then you better thank the heavens and keep a tight hold on him.
Girl 1: "Omg I spoke to Jack today and I couldn't stop staring into his eyes!"
Girl 2: "Wait don't you have a boyfriend?"
Girl 1: "Yeah I do, but this is JACK!!!"
Girl 2: "True, you go girl!"
Girl 2: "Wait don't you have a boyfriend?"
Girl 1: "Yeah I do, but this is JACK!!!"
Girl 2: "True, you go girl!"
by Anongirl27 July 6, 2016
Get the Jackmug. 
A jack is normally a boy who is obsessed with sport and has no time for girls, he is inconsiderate and arrogant which makes people dislike him. Despite this he can occasionally be sweet and loving however most of the time he is a cunt and cannot treat girls properly. Also he is the biggest failure ever! LOL
by loltruedat December 29, 2010
Get the jackmug. A highly useful word with many meanings
1) a man's first name, either as a shortened version of Jackson or as a nickname for John/Jon
2) a shortened version of jack-ass, as a way to avoid swearing
3) a substitute for the word shit, another way to avoid swearing
4) a nickname for a baseball home run
5) the nickname for Jack Daniel's Whiskey
6) a type of card in a standard deck
7) slang for stealing/ripping off, probably derived from the work 'hijack'
8) slang for excitement
9) slang for a beating
10) a nickname for money, popularized by the movie 'New Jack City'
1) a man's first name, either as a shortened version of Jackson or as a nickname for John/Jon
2) a shortened version of jack-ass, as a way to avoid swearing
3) a substitute for the word shit, another way to avoid swearing
4) a nickname for a baseball home run
5) the nickname for Jack Daniel's Whiskey
6) a type of card in a standard deck
7) slang for stealing/ripping off, probably derived from the work 'hijack'
8) slang for excitement
9) slang for a beating
10) a nickname for money, popularized by the movie 'New Jack City'
1) Jack London was a famous author.
2) "Stop making jokes and be serious, Larry. Don't be such a jack."
3) "Keith, stop acting like you understand. You don't know jack about what's going on with me and Emily."
4) Jason Bay hit a three-run jack over the left field fence.
5) "Hey Amanda, you wanna share the bottle of Jack I have hidden in my drawer?"
6) The jack is the face card with the lowest value.
7) "Those bastards at the convenience store jacked me out of my change. They gave me back a 5 instead of a 10."
8) The Steelers fans were really jacked up when they realized that their team was going to the Super Bowl.
9) Ross had been hitting on Charlie's girlfriend, so Charlie challenged him to a fight and really jacked him up!
10) "You got the jack to pay for this coke?"
2) "Stop making jokes and be serious, Larry. Don't be such a jack."
3) "Keith, stop acting like you understand. You don't know jack about what's going on with me and Emily."
4) Jason Bay hit a three-run jack over the left field fence.
5) "Hey Amanda, you wanna share the bottle of Jack I have hidden in my drawer?"
6) The jack is the face card with the lowest value.
7) "Those bastards at the convenience store jacked me out of my change. They gave me back a 5 instead of a 10."
8) The Steelers fans were really jacked up when they realized that their team was going to the Super Bowl.
9) Ross had been hitting on Charlie's girlfriend, so Charlie challenged him to a fight and really jacked him up!
10) "You got the jack to pay for this coke?"
by Tit For Twat January 21, 2007
Get the jackmug. by NotTripl3XXXMayhem December 1, 2013
Get the Jackmug. 
by That duude February 8, 2019
Get the Jackingmug.