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2. jack in
1. v. The opposite of masterbating; jack off
2. n. An uptight cock-sucker; fuck-face
I enjoy a good game of jacking in.

That billy is such a jack in
by jim jimson Nov 27, 2002 add a video
1. 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 Jul 13, 2003 add a video
3. jack in
August 21, 2008 Urban Word of the Day
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 Nov 20, 2004 add a video
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