Sac Jack 

To jerk only your sac when masturbating. Not the normal occassional tug on the sac, but pulling so hard that you nearly rip it off causing severe pain and swelling in the testicles. Usually done in conjunction with the bloody jack.

Your mom is hot, I think I'm going to sac jack to her and then beat the fuck out of her.

Sac Jack by Rev. Reggie Dingleberry August 24, 2004

Cactus Jack

The real form of this phrase is similar to a masturbatory experience known as "The Stranger" (in which you sit on your hand until it is numb and masturbate so that it feels like someone else is doing it)

The only variance is that when doing a "Cactus Jack" you wait for partial numbness to restore until you feel the "Pins and needles" in your hand. You then masturbate and it feels like you're jacking off a real cactus.

Other Notes: It does not matter much if you reach climax during this as real cacti retain liquid and cannot orgasm.

Should you jack off a real cactus please seek immediate medical help.

John was giving himself a stranger in the closet when suddenly it turned into a god awful Cactus Jack situation when the feeling in his hand came back. Next time John will sit on both of his hands before an attempt.

Cactus Jack by Bongsc2 January 21, 2010

Jackson 

The Biggest Asshole alive.

man that guy is such a Jackson

Jackson by adamjackson&jason69memefilms January 4, 2018

jack off 

To stoke the penis up and down in a motion like if you were to shake milk.

Today when I shook my chocolate milk, after 20 minutes it turned white thanks to the jack off motion.

jack off by Anonymous October 28, 2003

Action Jackson 

A person who was and occasionally is a player/pimp for relatively short increments of time.

Action Jackson's wrist is frostbit.

Action Jackson by wazupfoo April 19, 2003

jack

awesome. yet sometimes annoying. cool brother. pain. good listener. half trustworthy. i love him

"ohhh emmmghee, he's such a jack!"

jack by christophermbr August 17, 2009

Jack

total asshole in the best way. doesn't know when to stop ; yet never needs to. funny, sexy, crazy, and all around amazing. amazing in bed, you'll be coming back for more. you'll hate him but love him at the same time. can't live with him ; can't live without him. can always always always make people laugh & you will always catch a smile on his face. fly, high swag, unmistakable. when you see him, you'll know. all around GOD. boss @ life.

guy 1: yo, you see that guy right there? he's the king.
guy 2: yeah, he has to be a Jack.

Jack by killLaa. June 18, 2010