This is the motion one would make on their beer bottle after one has been bottle tapped. Preferably motioning from ones crotch and shaking the beer on the person who performed the tap. Making the money shot on them the ultimate rebuttal for douche baggery.
Martha just got out of prison and decided to bottle tap my freshly opened Corona. As my beer started to erupt, I poised, place the bottle close to my crotch, aimed, and stroked my bottle as it gushed all over her clothes and face. A classic beer jerk off performed flawlessly.
When a male, typically in his 20's or 30's, receives a hand job from an elderly, geriatric male or geriatric female.
Frank went to Walmart and with a little sweet talk, picked up an old lady in the pharmacy department. She accompanied him to his car in the parking lot where she graciously gave Frank a Geri-Jerk before resuming her shopping for adult diapers and fiber pills.
A prank pulled on your friends, where you grab one by the shoulders and forcefully ram your knee into their anus. Patented by the famous Aaron Kirk. One may confuse a kirk-a-jerk with farting while having a penis in your anus.
"I saw kaps doing some kind of bodybuilding bullshit, so i took the opportunity to give him one goodkirk-a-jerk. Man did he yelp"