A man that loves and adores everything about everyone. He doesn't discriminate or hate you no matter what you do. He's caring and understanding a knows what you are thinking at all times. He may do somethings that hurt or annoy you but he regrets those actions later. A Jack will always tell the truth no matter how hard it may be.
I think the world of my Jack :)
by Lily serendipity October 11, 2010
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The cute friendly stranger who ends up becoming your best friend in the whole entire world. The guy who you can't get over when you think you've lost him. The guy who knows how to forgive, and never give up on people.

Jenny is lucky to have found Jack, because he is a better gift than anything you could buy with money, and anything you couldn't with love.

by speedilegs8 September 01, 2012
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a spectacular man in bed! its crazy nuts he is soo good! Plus cute, smart, funny and strong. In Mythology means one who can fight without sword but using his "huge penis" against his wife. Any girl would want to date him. No one could say no to this guy.
Damn, Jack you were crazy nuts lastnight!
by pink pant hottie October 12, 2010
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A derogatory name used for the Australian Police Force made famous by the TV show Underbelly.
Fuck there are so many jacks around these days
by Jonny AA November 15, 2008
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Also known as Jackass. He is known for his ass behavior. Loves to work at the sweatshops of China. Usually all jacks are adopted. Has a habit of throwing spoons when agitated especially at crying babies. Got out of a relationship with Elmo.
Why are you being such a Jack right now?
by Buttlet123 June 19, 2016
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Someone you're either bffs with or sworn enemies with
Ex 1: I met Jack today and we're practically best friends already!
Ex 2: I fucking hate you Jack and will do anything to destroy you.
by itz_kidz October 02, 2016
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Guy who tries to wheel girls, but always ends up in the friendzone. See: Fuck Boy
"Yo, see that kid trying to wheel that girl, nigga ain't gettin shit. What a fuckin Jack dawg."
by Roach69 November 13, 2014
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