Verb. The act of thrusting a penis betwixt two clenched butt cheeks in lieu of traditional vaginal or anal intercourse until climax.
"My wife had a c section so we can't fuck for 6 weeks. Hopefully, she'll let me do some crack jacking."
by Kickernoc September 07, 2014
“Hey man what where you doing last night I saw u where hanging out with Adam Sandler and Steve Buscemi”
“I was just doing a dirty Jack”
“I was just doing a dirty Jack”
by Big J-man August 28, 2021
by P@nduh November 18, 2016
by #4Choclvr September 16, 2017
by ChickPro21 December 11, 2022
by Clean & LA April 28, 2008
A Jack Marsh is somebody that trembles in the sight of a father figure due to a dodgy past. A Jack Marsh for the most part will be an absolute bellend and be often subject to playing the victim card. His family name goes down generations in the fens due to 90% of the town chatteris being somehow related. A Jack Marsh is a boy of few words but when spoke to you are guaranteed major autism.
by FlynnyJoe October 29, 2019