naval jelly 

semen left in the belly button after ejaculation on the stomach.

Of course I didn't use a condom. I left her on the bed with a towel and a fresh batch of naval jelly

naval jelly by Poot there it is!!! December 17, 2016

Naval Jelly 

1) When you jerk off and some semen gets in your belly button, but you don't know that and after awhile it dries and ferments making your belly button hurt. Leading you to either put your finger or any other object in there. Feels hard but when you push in hard enough, you get a gooey substance out of your button consisting of ejaculate and lint.
2) Seaman's Semen

1) Dear diary today i had the worst case of Naval Jelly
2) COME ON ABOARD!! And swallow my Naval Jelly

Naval Jelly by catchingfire3 May 12, 2019

Navel Jelly 

The gelatinous substance that accumulates within the navel cavity after extended periods of hygiene neglect. Some have found said substance useful for removing rusted spots on oxidized surfaces.

Hey, do you have any Navel Jelly? I'm getting a bit rusty.

Navel Jelly by Andy Sejokinli June 17, 2011