J.O.M.B. - You save a cool image in your head so you can jerk off to it

You save a cool image in your head so you can jerk off to it later or brag about it to someone else.

I saw that guy in the hallway. I saved his face in my J. O. M. B. because I’m a loser.

I took a picture of my pizza and stored it in my J. O. M. B. for later use.

I remembered that girl’s laugh and saved it in my J. O. M. B. so I can use it when I’m bored.