jack one in

To cock or load a round of ammunition into the chamber of a weapon.

My gun was unloaded, i forgot to jack one in.

by MarkXIX November 16, 2007

Jack

Jack is a smart enough irish lad (lol) who is attracted to a girl who doesnt know what football scores mean or what tomorrow means either.

Whatsup Jack?

by hihihihihihihiy96969696 November 22, 2021

Jack Armstrong

While it may seem like a slang name, and very well might be to some, Jack Armstrong is also a name of high rank.

Jack Armstrongs are very handsome, caring, and intelligent men.

They give women the shivers and are the subject of day dreams.

Jack Armstrongs are forgiving, intellectual, and are quite possible the most dreamy of men.

Want to know what is more romantic than The Notebook?

Jack Armstrong is.

by SandyDunes November 2, 2014

jack adair

A type of guy who is a good friend and is really annoying. But he will do anything to help you out.

Amanda- who is that guy
Vicky - Jack Adair
Amanda - he’s really nice and annoying

by Mimi30 April 20, 2018

Jack-asshole

Noun. One who is simultaneously so idiotic and such a jerk that s/he goes beyond just "jack ass" or "asshole" to a combination of the two.

Also related: jack-assholery.

Did you see that truck taking up four parking spaces in the lot? That guy's a real jack-asshole.

by holacrr July 18, 2013

Jack in a Girl

Where a male cums in a girls vagina after sex, then the girl doesn’t clean out her vagina goes home to her boyfriend. The when her boyfriend/husband/fiancé fucks he is surprised by the jack in the girl.

Resuev dumped Lana after finding Adrian’s jack in a girl.

by George_Orwell 1984 January 27, 2018

Jack

The most flexible guy you will ever fucking meet, you don't know why but he is quite literally a pretzel of a man. He is a human anonymity when it comes to his spaghetti limbs

How the fuck does Jack bend like that? Holy fuck!

by Bananason July 15, 2022