Jack off

Composed of two words, jack and off. See those for the individual meanings.

I helped my uncle Jack off his horse.

by N. 1. August 26, 2006

Jack Off

To masturbate.
Can also be used to unexpectedly shock people.

Grandma caught her 15 year-old grandson jacking off (masturbating) and she passed out, had a massive heart attack and died.

by chikillanto August 22, 2003

rapping-jack

South Dakota term for "a very swollen, tight vagina" usually seen in North Korean during winter; other rapping-jacks can refer to the little outfits you can purchase to cover you rapping-jack(et) problem. Much money has been made from rapping-jack jackets; the vagina or "pussy" nevertheless stays very tight and swollen.

"Whoa DUDE, it tried to put my totem pole into her rapping-jack and that chick screamed something chinese at me...said later I had creamed on her rapping-jack jacket"

by Princess Peussie April 9, 2005

jacking steel

Lifting weights. "Steel" is reffered to as weights and "jacking" them mean lifting them.

After football practice we were jacking steel for 2 hours.

by Ed Reed June 11, 2006

dry-jacking

the performance of masturbation why not being able to ejaculate.

Boy 1- Dude, I was jacking off last night and i still couldn't cum.
Boy 2- Oh, so for short you were dry-jacking

by CREEPINxDEATH June 22, 2010

Jachin

That one funny guy in the group who you've never really thought about how weird their name is.

Alex is so funny he is almost as funny as a Jachin.

by DatBoiYeet June 25, 2019

Jack Balling

Vigorously yanking down on the scrotum with one hand while jerking off the cock with the other. Typically performed in synchronous harmony until a climactic finishing release.

My balls are really sore today. I watched porn all day in my dorm room and was jack balling myself.

by Eaton Holgoode April 26, 2017