Jack jack off off
A competition between multiple Jacks to see who can last the longest while they jerk off. It's like a race, but with more swearing and less running.
Jack from the gym had a Jack Jack Off Off with his friends. They all had to do it in the locker room.
At the Jack Jack Off Off in the park, one Jack lasted the longest. He got a trophy.
Jack from the office had a Jack Jack Off Off during lunch. Everyone got distracted.