Jacks

British slang for £5.
That DVD'll cost you a jacks.
by Antony November 10, 2005
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Jack

A very good-looking and perfect person. He can sometimes be funny and sometimes a little annoying. All in all, jack is a very positive name.
"life is chocolate, i'm a dog." -Jack
by ANNOYING123456789 June 26, 2017
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Jack

Someone who you could never forget, the kindest person who is not afraid to say how he feels. He has the strangest of friends and is very easy to talk to. You should never walk away from a Jack, it is the biggest mistake you could ever make.
"Jack is the sweetest guy!"
"I wish I had a Jack..."
by someone irrelevant May 02, 2015
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jacks

Usually used to buy a certain amount of weed worth £5 but has now been morphed to just plainly mean £5 in London Street language (jafaican)
"Oi rob, have you got enough for the cinema?"
"Nah Fam, I only got a jacks, buck (lend) me a nugget (pound)"
by Fiverdotman April 16, 2007
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Jack

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 20, 2016
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Jacking it

To show ones abs off in a deliberate way whilst trying to make it look accidental
God look at Jack. He'said Jacking it in front of Rose
by Forshizzlemenizzle January 20, 2017
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Jack

A piece of shit that thinks he’s all that. He is a septic tank full of crap
Jack: move biches

Everyone else: excuse me septic tank but I wouldn’t be talking all of that shit, oh wait you are shit,and your full of it
by Your mom 321 March 30, 2019
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