Much like a blumpkin (a man receiving a blow job while sitting upon a toilet, passing feces.) A snorkel is when a man has
vaginal sex with a female, while she herself is using the toilet, passing feces. The man's penis is
submerged below
the toilet seat level, with the rest of his body on the outside of the toilet.
Mr.
Testy: Hey
Timmy, why do you keep
scratching your penis?
Timmy: Well Mr. Testy, last night my girlfriend and I were horny, but she had to take a poop, so to save time, I had sex with her while she was pooping. It's called a snorkel sir.
Mr. Testy: Ah, a snorkel, brilliant!