Relating to the term "osmosis" when molecules pass through one cell to another via the call membrane, cosbmosis is the act of passing fecal matter from one person to the other through their dickhole via anal sex.
Big Easy: Yea, so, I, uh, I wouldn't recommend having anal sex if you have not already tried yet.
Tyrantula: Yea why is that?
Big Easy: While I was plugging that hole up, the nachos supreme she had earlier came right out and into my dick filling it up like it was a syringe of diarrhea.
Tyrantula: Didn't you pay attention in bioLOGy? You just went through cosbmosis.
Tyrantula: Yea why is that?
Big Easy: While I was plugging that hole up, the nachos supreme she had earlier came right out and into my dick filling it up like it was a syringe of diarrhea.
Tyrantula: Didn't you pay attention in bioLOGy? You just went through cosbmosis.
by Uncle Gary's Potato Farm March 29, 2019
Get the Cosbmosismug.