Grandpa Jack 

Grandpa jack is the one thing that God can`t compare to. He has been around since 001 BC. Grandpa Jack has the most human teeth ever, collecting them from his brethens graves and keeping them in a bag made of the sun Galactica.

Oh my Grandpa Jack!

What in the name of Grandpa Jack!

I swear it on Grandpa Jack...

Grandpa Jack by Grand Father Jack November 1, 2016

Fart-jack 

The act of covertly farting right after someone else has farted so the original farter takes all the blame.

I know my fart did not smell like that did, you just FART-JACK me.

Someone in this car just Fart-Jacked me because I know that wasn't me.

Fart-jack by Brain Giggles April 4, 2017

urban jack 

An urban dwelling male who grows a beard, grooms it, has a trendy comb-over and wears flannel shirts and skinny jeans. And also shops at REI and possibly drives a Jeep or Subaru but always has it clean. And he never actually goes to the woods or camps in a tent but goes for day hikes, instead, takes selfies and posts them to social media.

Most millennial males are urban jacks.

urban jack by Valero5822 April 20, 2018

slide jack 

The act of claiming PowerPoint slides from a co-presenter and presenting as your own.

Joe completely slide jacked the best segment of our presentation.

slide jack by DQJ June 2, 2018

Donkey Jack

When someone prevents you from doing something you wanna do and you get some revenge.

I was going to build a house but that bitch stopped me so I donkey jacked his face

Donkey Jack by Shpas June 7, 2018

Cracker Jack

1. A substance which contains wheat, is hard and may contain sugar.
2. Usually a fraternity initiation which requires a person to eat a cracker with semen all over it. Like a Semen Sandwich but you swallow ;(

Harvey: How do I join your fraternity?
Wilson: You just have to eat a Cracker Jack.
Harvey: Is that it? I’ll do it.
..................................................
Harvey was horrifyed by what his frat initiators made him do.

Cracker Jack by DYLkyrdrdy September 6, 2018

E Jack 

To have an orgasm

We were at it for 30 minutes, I had to hit a E Jack when she got on top

E Jack by Lexx Diamond November 26, 2018