Slumber-Jack 

A Slumber-Jack refers to the combination of masturbation & napping. Masturbation is used as a natural sleep aid.

I think the only cure for this hangover is a good Slumber-Jack.

Slumber-Jack by Midnight Stroker August 20, 2008

Crack Jack 

When you bust your nut solely from stroking your meat between the ass cheeks of your partner. There’s no penetration. Just friction from that ass crack.

I did the old crack jack last night and nutted all over the small of her back.

I did a crack jack last night with no lube. The skin to skin friction was intense.

Crack Jack by Eaton Holgoode October 11, 2018

bloody jack 

Jacking off so much that your penis starts to bleed. Although it is bleeding, you continue to jerk it and jerk it and jerk it until all of the skin comes off like a peeled banana. Usually done in front of a crowd.

It's Tuesday....time for my bloody jack show at the local pavillion. I hope this time I can get the blood and cum flowing at the same time!!!! mmmm I love the bloody jack....I am the bloody jack MASTER!!!!

bloody jack by Rev. Reggie Dingleberry August 10, 2004

web jack 

(v) To steal an idea from the internet. The act by which ideas are stolen, or the realization that your idea has already been thought of via the world wide web.

"Oh man, my word has been web jacked on Urban Dictionary."

"Oh wow, this is brilliant, let's web jack it!!"

web jack by S. Truman Stone October 30, 2007

tounge jack

the act of using your tounge to brutally lick some part of a peron's genitalia, with ferocious speed.

I tounge jacked that girl's stink nugget last night!

tounge jack by Krazy Kat's October 30, 2007

Pre-Jack 

Clear substance which precludes sex. Often causing squigy-ness in one's shorts, leading to your hammer sticking to your gitch.

ex.1
Guy: You don't have to spit baby!, just use the pre-jack!

Girl: yeah!

ex.2
Girl: Shit, did you cum already!!?!?!

Guy: Naa, Girl, it's just a lil pre-jack... fap.

Pre-Jack by Bejnay March 10, 2009

Uncle Jack 

The most amazing dumpster diver/ garbage picker/ garbage sorter/ trash hoarder in the world. He dwells in he Big Blue Box in Thunder Bay. Uncle Jack enjoys spending time with his family (Jacob Hoggard, Dave Rosin, Chris Crippin, Tommy Mac) and taking long, romantic strolls through the landfill at sunset.

Uncle Jack, what are you looking for in the big blue box?

Uncle Jack by Uncle Jack May 24, 2012