Jack-a-jack 

The onomatopoeic word describing the sound made when male masturabation occurs.

"Dave was going at it so hard last night all I could heard was jack-a-jack-a-jack-a-jack through the wall"

Jack-a-jack by Poon January 23, 2005

Fuck a jackalope day 

Fuck a jackalope day is an international holiday celebrated on the 18th of December. Celebrators typically pound the plump ass of the nearest jackalope then treat them for aftercare cuddles.

Damn, tomorrow is fuck a jackalope day, my dick is rock hard.

Fuck a jackalope day by meatier December 17, 2020

pulling a jack 

someone (usually a male) who gets very excited over doing things with the opposite sex that others find mundane.

bro 1: were's sam?
bro 2: he's over there cuddling with elizabeth
bro 1: she's so drunk! practically unconscious!

*sam walks up*

sam: guys! guys! i was cuddling with elizabeth! i even put my hand on her ass!
bro 1: *whispers* he's pulling a jack

pulling a jack by chachboyginger November 4, 2010

Pulling a Jack 

The endless promises by a sex that states the importance of one another. After the hook up, one will completely drop the other, calling the other weird and or clingy just because they want to begin a new and or figure out past issues.

Jen: I thought they were doing well.

Eric: well it all ended because Zach started "pulling a Jack."

Jen: ew what a fucking dick hole...

Pulling a Jack by Youiswrong September 24, 2015

being a Jack 

This is when someone (usually named jack) is hiding their sexuality for example they are gay but will hide it and make fun of other heterosexual males calling them gay on the off chance he can convert one of them so therefore when he comes out the closet he isn't alone.

Hey you, why you being a Jack? No one likes a Jack.

being a Jack by nijardan10 March 30, 2020

a jack barnard 

When a man takes a shit on another man, slaps it, and then licks up them mess after whilst both participants are wearing clogs

Man 1: Hey babe, wanna do a jack barnard?
Man 2: Sure, but let me put down a towel first because last time you stained the walls

a jack barnard by Rhoddy February 23, 2020

A jack man 

When your penis spontaneously pops out of your pants

I was in school and i had a jack man

A jack man by TensityShift December 22, 2020