jackstall 

Pronounced jack-stal
Verb: To quit or pull out of something because you are rubbish at it.
Noun: Someone who frequently quits things or has recently quit something because they were doing badly.

'i got an E in Latin in the mock exam. I think I might jackstall it.'

'I'm rubbish at Latin, I think I might quit.'
'You're such a jackstall.'

jackstall by please accept. i cba try again December 27, 2016

Shaft Jackstall 

V. The act of beating your meat in school during school hours.

Guy 1: Hey where the fuck where you in AP special Ed?
Guy 2: I skipped and pulled a shaft jackstall in the bathroom".

Shaft Jackstall by Big_nig_6969 June 7, 2018

jackstack

Smoking hot administrative assistant who makes up the thin line between loving your job and quiting.

I wasn't going to come to work today, but with jackstack around, it aint so bad.

jackstack by Beeyo November 1, 2007

Jackballed Up 

Related to Jackball. To be in a state where you get so upset that you act dumber and dumber, further hurting your own cause.

The mob got jackballed up and continued to riot, when they realized that they were only helping the group they oppose.

Jackballed Up by Brian A. Miller October 12, 2004

JACKBALLIN 

verb. A hybrid word derived from words Jacking(off money) and ballin. 1. Frivolous spending without regards to priority, in order to appear as a baller.

WORD ORIGINATED IN NAPTOWN,IN

TEST>>> If you wake up in the morning thinking about what you could have, or should have spent the money on you were JACKBALLIN.

JACKBALLIN by Kenn Starr January 4, 2008

Jackstain 

A stupid person described by a spot or spots of ejaculation.

"Paulie was busted after trying to buy weed from an undercover cop...he is a real jackstain."

Jackstain by Shawna123 September 2, 2005

jackstack

A large stack of porngraphic magazines that one would use to masturbate to or jack-off to.

My girlfriend found my jackstack and wants me to add some lesbian magazines to it.

jackstack by Dan Brooks December 23, 2007