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."

by TheOneAndOnlyHippie December 8, 2014

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?"

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

by An.kim September 25, 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

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.

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

by Dr P. Fletcher November 23, 2018

half jack

Jacking off and ending right before you’re about to cum and then proceeding to workout right after to maximize T-levels. Proven way to get your biceps bigger
Better Pre-workout than Gnar Pump

Me: Hey Joe, why couldn’t you sumo deadlift 450 today?
Joe: Bro, honestly, I didn’t half jack today, I’m just not feeling as good
Me:Pussy

by Half-Jacking December 12, 2018