Jacks (Banners) are specimens of a high land mass of about 1 tonne. They are prone to offer everyone on but never follow up on it. Also he has shit house parties.
by Banner has a big chin February 20, 2019

When your man TRIES to discretely jack-off next to you in bed, thinking you're fast asleep, when in all reality, your laying there quietly, as the mattress gently, yet distinctly begins to bounce slightly, then more and more rapidly until he finally gets it done or until you kindly ask if he would like some help.
by posterpoker13 January 29, 2016

by Kevin boi May 23, 2016

An over the top kind of guy. Always is screaming at everything, and is always hyper. Making this... THING the most weirdest, but dumbest person alive.
by Harry Chaudary February 15, 2020

The use of the word is done so in which to trick someone during the game of Bullshit / Cheat / I Doubt It, not just restricted to jacks but to your personal favourite card. This is used to make someone think you are bullshitting, or to people that know you more well, make them think you are in fact not bullshitting.
You: Yeah I place down a stealth jack...I mean a 7
Silly Billy: Oh mate that defo bullshit you so put down a jack
You: nah m9 #dealwithit
or
You: Stealth jac...I mean a 6
People: You do that all the time now we know it is a 6
You: *gets a free pass for lying*
Silly Billy: Oh mate that defo bullshit you so put down a jack
You: nah m9 #dealwithit
or
You: Stealth jac...I mean a 6
People: You do that all the time now we know it is a 6
You: *gets a free pass for lying*
by iBroadwell March 9, 2015

When you’re fucking a girl and your dick slips out and you try to go in and it hits against the pussy
by WeDalt dlril June 12, 2024

by Jackywacky12 September 23, 2020
