Grenading
When you're in the shower and you have to poop—Instead of getting out, you poop in your hand, pull back the shower curtain, and toss it in the toilet.
Example:
Dude, I had to shit really bad, but didn't want to get the floor all wet.. So I had a grenading session in the shower.
Dude, I had to shit really bad, but didn't want to get the floor all wet.. So I had a grenading session in the shower.