A very small and drastically curved penis usually 7 inches or less.
Girl one: "Well why did you break up with him?"

Girl two: "He had a Jack!"

Girl one: "Thats just sad..."
by STiFFBASSiST February 26, 2012
This guy is an ultimate farmer. He is rather large and a bit of a jack. He likes to think he has friends when in reality he is all on his 'jack'. he bigs himself up and pretends that he is hard but he is truly whipped.
"yo that kid's such a jack!"
by danny mayer November 15, 2011
Slang for money, usually refers to large amounts.
To get a car that nice, this guy had to spend some jack.
by TommyNoleFin May 03, 2011
A wanka who uses girls for sexual shit when all they want is a honest relationship
That dudes a jack

How'd ya kno he fingered me
by Jdavidson April 29, 2011
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
street slang in NYC for bags of crack
swallow those jacks my nukka, po-9 is rollin up!
by hustlenomics June 21, 2006
another word for pay phones
"Also, cribs is homes, jacks is pay phones
Cocaine is known as candy, cigarettes is bones"

-Big L
by nas February 16, 2005

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