Jackshaft 

sick lax bro who thinks he is sick. Unfortunately he is not.

Yo that sick laxer is such a jackshaft

Jackshaft by jayme trilling January 4, 2013

Jackshaft 

A. The act of masturbating a thick meaty phallus, roughly and with intent (typically to completion). All twig action, the berries don’t get a look in.

B. A good band name.

A. Fancy popping around this evening for a drink? Only if I’m also gonna get a good old jackshaft - I’m backed up at the moment, and suspect I have a hair trigger.

B. Hey guys - I’m heading down the club tonight, a few pints and to watch that band Jackshaft - they’re awesome, and with a hot singer.

Jackshaft by DrummerInABand April 21, 2021

jackhat 

A cross between a jackass and an asshat. Can be used in situations where it's not appropriate to say "ass".

(With kids in the car) "That jackhat just cut me off!"

jackhat by Trogdor|nubtastic October 19, 2005

Jackshitter 

Someone who enjoys jacking off at the same time as taking a shit. Usually a guy named Ketan.

I was watching porn while on the pot.

I couldn't help but jackshit..

When his buddies found out he was jacking off while taking a dump, he was forever known as a jackshitter..

Jackshitter by Jayjay May 3, 2014

Jackshirt 

A jacket or sweatshirt.

Example 1:

"Hey! I like your Jackshirt!"

Example 2:

"Your Jackshirt is hawtttttt."

Jackshirt by Olga Pervloski December 18, 2008

Jackshapher 

The coming together of many friends to celebrate the birth of the three most important of the lot.

I was very excited to be invited to Jackshapher '09, and I knew I couldn't miss it.

Jackshapher by bobbobobbobob January 18, 2009

jackshit 

nothing

i ant doin jackshit dude

jackshit by Knighty July 12, 2003