Jack on

The art of jacking on is a much unknown art lost long ago in the Roman empire
Archieologists have discovered several requirements for jacking on by studying scripts from roman murals
the requirements are as follows
1.Strong left leg
2.Slightly short middle fingers
3.a high pain thershold
4.6 foot 2.5
we would ask anyone with these qualitys to ontact their local museum and ask about the phenomenon and then ask were they can go for testing into these qualitys in relationship to curent reasearch

"Oh man last night i had the biggest jack on last night and I nearly broke my left leg as it wasnt strong enough"
"That totally sucks!"

by Jack onner October 1, 2007

jack and jack

They are two vine famous teenagers from Nebraska. They also have many good songs like "doing it right" and "flights". Jack Johnson and Jack gilinsky are also very hot.

Girl #1- I love jack and jacks song doing it right
Girl #2- Me too

by I love to turn up August 11, 2014

Jack to Jack

The Jack to Jack (Back to Back Jack) Is the attempt to masturbate immediately following a previous orgasm.

I attempted a Jack to Jack but I was to sensitive to continue.

by CharitableNinja February 8, 2009

jack-jack

Person who is kind & wholesome until pushed over the line. Reference to baby JackJack from "The Incredibles" Movie.

Don't keep pushing him. He's going to go Jack-Jack.

Be careful with him. He's got a Jack-Jack personality

by moviedude March 9, 2008

jack jacked

When a guy is jacking off and is interrupted by a second individual who "lends a hand" and finishes the job.Ideally,the interloper could be the wife,girlfriend,a hot maid,or cute neighbor girl. Strangely,the good samaritan could be a sister,grandma,brother or roommate.

I was choking the chicken when my sister's hot friend barged in the bathroom and jack jacked me.

by wolfbait51 May 24, 2011

Jack Jack

When one leaves his seat and calls jack jack which ultimately reserves that seat for him when he returns. Jack Jack was created long before Tap Tap and Jack Jack actually over rides all claims to tap tap. Originated in the city of Gig Harbor which was founded way before Tacoma.

When you get up, "Jack Jack".

by Chris Macky January 4, 2008

jack jack

a dude who is always lifting big things.

when alcohol becomes involved don't go near bro, he will fight u

loves a romp
claims an amateur mui tai fighter would beat Mike Tyson

damn bro is at the gym, he is a total jack jack !!

by kinglegend69 August 23, 2022