jack in

1. to connect to a system via wire or ethernet

2. to log in to a website or computer

When I try to jack-in I get an error.

by DrZin July 13, 2003

jack in

v.
1. To gain entry; to connect, as to a network.
2. To enter or connect by deceptive or unscrupulous means, esp. with malicious intent.

"He tried to jack in and take down their group from the inside after he heard what they were saying about him behind his back."

by tlc November 20, 2004

jack in

1. v. The opposite of masterbating; wordjack off/word
2. n. An uptight cock-sucker; wordfuck-face/word

I enjoy a good game of jacking in.

That billy is such a jack in

by jim jimson November 27, 2002

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