to knife-jack 

to kidnap someone at knife point, then proceed to take them hostage, threaten, rape, or in some cases, kill them.

Nobody knows to this day if Jack the RIpper tried to knife-jack his victims or if he used more subtle forms of psychological manipulation on them before killing them.

if you want to learn how to knife-jack someone, your best bet would be to talk to someone like Jack the Ripper.

to knife-jack by Uncle Dimma March 5, 2015

The Influence of Jack

The complete and utter shut-down of all recognition of standards whilst masturbating, that provides the illusion of almost any female bearing attractiveness, and can also go as far as making sexual acts one would not deem attractive, enjoyable or "sexy".

Man, she was rank, but I was under the influence of Jack and I was prepared to take what I could get.

The Influence of Jack by The Philosophiser April 12, 2015

That nigga Jack 

A guy named Jackson or jack that likes to give head to Short Hispanic men like Noe

"hey you know that nigga Jack gives bomb ass head!"

That nigga Jack by That nigga Noe February 19, 2019

Pulling a jack 

Pulling a jack is when your party/chat is annoying and toxic so you mute them.

You your so fucking annoying and toxic I’m considering pulling a jack

Pulling a jack by CG MonoChrome August 3, 2019

Doing a Jack

Acting like a right twat and triple dropping ecstasy pills

I’m Doing a Jack see you in the welfare tent

Doing a Jack by Juro94 August 28, 2019

feed jack 

When someone goes on holiday without telling you and wants you to feed their pet.

My mother-in-law : I'm away for a couple of days in the camper van, can you feed Jack.

Me : Yeah sure, I'll just drop everything to feed your damn cat, like a don't have a life of my own.

feed jack by Silky Si McFly May 23, 2006

tip jack 

a way to masturbate, by gently squeezing the bottom of your tip

"No hand jobs tonight baby, my dick is too sore."
"How about a tip jack?"

tip jack by Ryan C in the B December 23, 2008