Jacket and Jack It 

The motion of getting your jacket, placing it over your crotch area, sliding your arms under the fabric, reaching for your dick with a hand, and masturbating away. The move is usually used for concealment when in a public area while having a very high sex drive.

Isaiah: Yo bro, I got nudes from her yesterday while I was in Walmart and I just had to jack off then and there using the jacket and jack it method

Brandon: Really bro? I got caught and kicked out of Target for doing that

Brian: I don't use the jacket and jack-it method. I just take my dick out in public and jerk off in front of everyone

Jacket and Jack It by DuncanDonuts October 27, 2018

Jickety Jack 

When someone is beyond a jack ass. When they repeatedly do things to jack you up. When they are idiotic beyond repair. Must be said with GUSTO!

"Did you see that guy almost hit me with his car? What a jickety jack!"

"Can you believe that jickety jack is standing outside my window talking on his phone all night?"

Jickety Jack by Evil Slater June 27, 2014

know jack 

Australian slang - means to understand, to know.

he doesn't know jack about rugby - he knows nothing about rugby

know jack by An.kim September 25, 2014

flappy jack

When a fat chick rolls her arm fat (or flaps) over a man's dick and proceeds to jack him off

"Did you get sex last night?"

"No, I just got a flappy jack."

flappy jack by TheOneAndOnlyHippie December 8, 2014

Got Jack'd 

When you go to Jacks casino, and inevitably lose your most recent pay check.

"Doesn't Laurence still owe you 100 euros?" - Daniel

"no shit, but he got jack'd again. Maybe next month. " - J

Got Jack'd by TheWordWizSwagFuck April 30, 2016

Captain Jack Syndrome 

When your inner compass points you towards booty, the thing you most desire.

Nick: Damn, what was up with Rob last night? Never seen him hunt a girl so hard.
Mike: Ah dude, she is the hottest girl in school! That booty gave him Captain Jack Syndrome.

Captain Jack Syndrome by Hook Me Choob June 16, 2016

Marvel Jack 

That knobhead who goes to the park with you and your mates, yells wogwan at every person there, then gives himself brain trauma with an inanimate object.

Person1: Did u hear about that fucking kid
Person2: The one who tried to look cool by running up a skateboard ramp then fucking smacking his head into it
Person1: Yeah lol, what a Marvel Jack. He can’t read or write anymore

Marvel Jack by Dr P. Fletcher November 23, 2018